diff --git a/src/qemu/qemu_capabilities.c b/src/qemu/qemu_capabilities.c
index 7ebd18af1b..f9b62680ba 100644
--- a/src/qemu/qemu_capabilities.c
+++ b/src/qemu/qemu_capabilities.c
@@ -1699,7 +1699,6 @@ static virQEMUCapsDeviceTypeProps virQEMUCapsDeviceProps[] = {
 };
 
 static struct virQEMUCapsStringFlags virQEMUCapsObjectPropsMemoryBackendFile[] = {
-    { "discard-data", QEMU_CAPS_OBJECT_MEMORY_FILE_DISCARD },
     { "align", QEMU_CAPS_OBJECT_MEMORY_FILE_ALIGN },
     { "pmem", QEMU_CAPS_OBJECT_MEMORY_FILE_PMEM },
     /* As of QEMU commit 8db0b20415c129cf5e577a593a4a0372d90b7cc9 the
diff --git a/tests/qemucapabilitiesdata/caps_4.2.0.aarch64.xml b/tests/qemucapabilitiesdata/caps_4.2.0.aarch64.xml
index 88e5a982f7..25175dbe40 100644
--- a/tests/qemucapabilitiesdata/caps_4.2.0.aarch64.xml
+++ b/tests/qemucapabilitiesdata/caps_4.2.0.aarch64.xml
@@ -92,7 +92,6 @@
   <flag name='nbd-tls'/>
   <flag name='pr-manager-helper'/>
   <flag name='qom-list-properties'/>
-  <flag name='memory-backend-file.discard-data'/>
   <flag name='screendump_device'/>
   <flag name='hda-output'/>
   <flag name='vhost-vsock'/>
diff --git a/tests/qemucapabilitiesdata/caps_4.2.0.ppc64.xml b/tests/qemucapabilitiesdata/caps_4.2.0.ppc64.xml
index e30e025e29..1cee3e84b5 100644
--- a/tests/qemucapabilitiesdata/caps_4.2.0.ppc64.xml
+++ b/tests/qemucapabilitiesdata/caps_4.2.0.ppc64.xml
@@ -90,7 +90,6 @@
   <flag name='nbd-tls'/>
   <flag name='pr-manager-helper'/>
   <flag name='qom-list-properties'/>
-  <flag name='memory-backend-file.discard-data'/>
   <flag name='screendump_device'/>
   <flag name='hda-output'/>
   <flag name='vhost-vsock'/>
diff --git a/tests/qemucapabilitiesdata/caps_4.2.0.s390x.xml b/tests/qemucapabilitiesdata/caps_4.2.0.s390x.xml
index f96bea1901..7eda72597a 100644
--- a/tests/qemucapabilitiesdata/caps_4.2.0.s390x.xml
+++ b/tests/qemucapabilitiesdata/caps_4.2.0.s390x.xml
@@ -59,7 +59,6 @@
   <flag name='nbd-tls'/>
   <flag name='pr-manager-helper'/>
   <flag name='qom-list-properties'/>
-  <flag name='memory-backend-file.discard-data'/>
   <flag name='vfio-ccw'/>
   <flag name='screendump_device'/>
   <flag name='vhost-vsock'/>
diff --git a/tests/qemucapabilitiesdata/caps_4.2.0.x86_64.xml b/tests/qemucapabilitiesdata/caps_4.2.0.x86_64.xml
index c4599e2520..f0c65ef45f 100644
--- a/tests/qemucapabilitiesdata/caps_4.2.0.x86_64.xml
+++ b/tests/qemucapabilitiesdata/caps_4.2.0.x86_64.xml
@@ -122,7 +122,6 @@
   <flag name='tpm-crb'/>
   <flag name='pr-manager-helper'/>
   <flag name='qom-list-properties'/>
-  <flag name='memory-backend-file.discard-data'/>
   <flag name='screendump_device'/>
   <flag name='hda-output'/>
   <flag name='vmgenid'/>
diff --git a/tests/qemucapabilitiesdata/caps_5.0.0.aarch64.xml b/tests/qemucapabilitiesdata/caps_5.0.0.aarch64.xml
index c3d1c90195..1d8671ce49 100644
--- a/tests/qemucapabilitiesdata/caps_5.0.0.aarch64.xml
+++ b/tests/qemucapabilitiesdata/caps_5.0.0.aarch64.xml
@@ -94,7 +94,6 @@
   <flag name='nbd-tls'/>
   <flag name='pr-manager-helper'/>
   <flag name='qom-list-properties'/>
-  <flag name='memory-backend-file.discard-data'/>
   <flag name='screendump_device'/>
   <flag name='hda-output'/>
   <flag name='vhost-vsock'/>
diff --git a/tests/qemucapabilitiesdata/caps_5.0.0.ppc64.xml b/tests/qemucapabilitiesdata/caps_5.0.0.ppc64.xml
index 899eabfc22..bd02db19d7 100644
--- a/tests/qemucapabilitiesdata/caps_5.0.0.ppc64.xml
+++ b/tests/qemucapabilitiesdata/caps_5.0.0.ppc64.xml
@@ -92,7 +92,6 @@
   <flag name='nbd-tls'/>
   <flag name='pr-manager-helper'/>
   <flag name='qom-list-properties'/>
-  <flag name='memory-backend-file.discard-data'/>
   <flag name='screendump_device'/>
   <flag name='hda-output'/>
   <flag name='vhost-vsock'/>
diff --git a/tests/qemucapabilitiesdata/caps_5.0.0.riscv64.xml b/tests/qemucapabilitiesdata/caps_5.0.0.riscv64.xml
index dc89b93e38..62f57c8f3d 100644
--- a/tests/qemucapabilitiesdata/caps_5.0.0.riscv64.xml
+++ b/tests/qemucapabilitiesdata/caps_5.0.0.riscv64.xml
@@ -91,7 +91,6 @@
   <flag name='nbd-tls'/>
   <flag name='pr-manager-helper'/>
   <flag name='qom-list-properties'/>
-  <flag name='memory-backend-file.discard-data'/>
   <flag name='screendump_device'/>
   <flag name='hda-output'/>
   <flag name='vhost-vsock'/>
diff --git a/tests/qemucapabilitiesdata/caps_5.0.0.x86_64.xml b/tests/qemucapabilitiesdata/caps_5.0.0.x86_64.xml
index 7d95c8e62a..7437631233 100644
--- a/tests/qemucapabilitiesdata/caps_5.0.0.x86_64.xml
+++ b/tests/qemucapabilitiesdata/caps_5.0.0.x86_64.xml
@@ -122,7 +122,6 @@
   <flag name='tpm-crb'/>
   <flag name='pr-manager-helper'/>
   <flag name='qom-list-properties'/>
-  <flag name='memory-backend-file.discard-data'/>
   <flag name='screendump_device'/>
   <flag name='hda-output'/>
   <flag name='vmgenid'/>
diff --git a/tests/qemucapabilitiesdata/caps_5.1.0.sparc.xml b/tests/qemucapabilitiesdata/caps_5.1.0.sparc.xml
index 44d8bec650..9414b4f645 100644
--- a/tests/qemucapabilitiesdata/caps_5.1.0.sparc.xml
+++ b/tests/qemucapabilitiesdata/caps_5.1.0.sparc.xml
@@ -30,7 +30,6 @@
   <flag name='nbd-tls'/>
   <flag name='pr-manager-helper'/>
   <flag name='qom-list-properties'/>
-  <flag name='memory-backend-file.discard-data'/>
   <flag name='screendump_device'/>
   <flag name='egl-headless'/>
   <flag name='memory-backend-memfd'/>
diff --git a/tests/qemucapabilitiesdata/caps_5.1.0.x86_64.xml b/tests/qemucapabilitiesdata/caps_5.1.0.x86_64.xml
index f9e4031b14..27335beb96 100644
--- a/tests/qemucapabilitiesdata/caps_5.1.0.x86_64.xml
+++ b/tests/qemucapabilitiesdata/caps_5.1.0.x86_64.xml
@@ -121,7 +121,6 @@
   <flag name='tpm-crb'/>
   <flag name='pr-manager-helper'/>
   <flag name='qom-list-properties'/>
-  <flag name='memory-backend-file.discard-data'/>
   <flag name='screendump_device'/>
   <flag name='hda-output'/>
   <flag name='vmgenid'/>
diff --git a/tests/qemucapabilitiesdata/caps_5.2.0.aarch64.xml b/tests/qemucapabilitiesdata/caps_5.2.0.aarch64.xml
index d5f66fcbd8..0a4a746c70 100644
--- a/tests/qemucapabilitiesdata/caps_5.2.0.aarch64.xml
+++ b/tests/qemucapabilitiesdata/caps_5.2.0.aarch64.xml
@@ -93,7 +93,6 @@
   <flag name='nbd-tls'/>
   <flag name='pr-manager-helper'/>
   <flag name='qom-list-properties'/>
-  <flag name='memory-backend-file.discard-data'/>
   <flag name='screendump_device'/>
   <flag name='hda-output'/>
   <flag name='vhost-vsock'/>
diff --git a/tests/qemucapabilitiesdata/caps_5.2.0.ppc64.xml b/tests/qemucapabilitiesdata/caps_5.2.0.ppc64.xml
index dd8f93e4cd..5f67489600 100644
--- a/tests/qemucapabilitiesdata/caps_5.2.0.ppc64.xml
+++ b/tests/qemucapabilitiesdata/caps_5.2.0.ppc64.xml
@@ -90,7 +90,6 @@
   <flag name='nbd-tls'/>
   <flag name='pr-manager-helper'/>
   <flag name='qom-list-properties'/>
-  <flag name='memory-backend-file.discard-data'/>
   <flag name='screendump_device'/>
   <flag name='hda-output'/>
   <flag name='vhost-vsock'/>
diff --git a/tests/qemucapabilitiesdata/caps_5.2.0.riscv64.xml b/tests/qemucapabilitiesdata/caps_5.2.0.riscv64.xml
index f82171b523..64c0d6a51b 100644
--- a/tests/qemucapabilitiesdata/caps_5.2.0.riscv64.xml
+++ b/tests/qemucapabilitiesdata/caps_5.2.0.riscv64.xml
@@ -89,7 +89,6 @@
   <flag name='nbd-tls'/>
   <flag name='pr-manager-helper'/>
   <flag name='qom-list-properties'/>
-  <flag name='memory-backend-file.discard-data'/>
   <flag name='screendump_device'/>
   <flag name='hda-output'/>
   <flag name='vhost-vsock'/>
diff --git a/tests/qemucapabilitiesdata/caps_5.2.0.s390x.xml b/tests/qemucapabilitiesdata/caps_5.2.0.s390x.xml
index 1d9ccea520..7f0b971e77 100644
--- a/tests/qemucapabilitiesdata/caps_5.2.0.s390x.xml
+++ b/tests/qemucapabilitiesdata/caps_5.2.0.s390x.xml
@@ -57,7 +57,6 @@
   <flag name='nbd-tls'/>
   <flag name='pr-manager-helper'/>
   <flag name='qom-list-properties'/>
-  <flag name='memory-backend-file.discard-data'/>
   <flag name='vfio-ccw'/>
   <flag name='screendump_device'/>
   <flag name='vhost-vsock'/>
diff --git a/tests/qemucapabilitiesdata/caps_5.2.0.x86_64.xml b/tests/qemucapabilitiesdata/caps_5.2.0.x86_64.xml
index b8bc71ff69..7369c2e1b2 100644
--- a/tests/qemucapabilitiesdata/caps_5.2.0.x86_64.xml
+++ b/tests/qemucapabilitiesdata/caps_5.2.0.x86_64.xml
@@ -121,7 +121,6 @@
   <flag name='tpm-crb'/>
   <flag name='pr-manager-helper'/>
   <flag name='qom-list-properties'/>
-  <flag name='memory-backend-file.discard-data'/>
   <flag name='screendump_device'/>
   <flag name='hda-output'/>
   <flag name='vmgenid'/>
diff --git a/tests/qemucapabilitiesdata/caps_6.0.0.aarch64.xml b/tests/qemucapabilitiesdata/caps_6.0.0.aarch64.xml
index 37abd13332..466832fde8 100644
--- a/tests/qemucapabilitiesdata/caps_6.0.0.aarch64.xml
+++ b/tests/qemucapabilitiesdata/caps_6.0.0.aarch64.xml
@@ -94,7 +94,6 @@
   <flag name='nbd-tls'/>
   <flag name='pr-manager-helper'/>
   <flag name='qom-list-properties'/>
-  <flag name='memory-backend-file.discard-data'/>
   <flag name='screendump_device'/>
   <flag name='hda-output'/>
   <flag name='vhost-vsock'/>
diff --git a/tests/qemucapabilitiesdata/caps_6.0.0.s390x.xml b/tests/qemucapabilitiesdata/caps_6.0.0.s390x.xml
index c946be4268..fefa817b9d 100644
--- a/tests/qemucapabilitiesdata/caps_6.0.0.s390x.xml
+++ b/tests/qemucapabilitiesdata/caps_6.0.0.s390x.xml
@@ -57,7 +57,6 @@
   <flag name='nbd-tls'/>
   <flag name='pr-manager-helper'/>
   <flag name='qom-list-properties'/>
-  <flag name='memory-backend-file.discard-data'/>
   <flag name='vfio-ccw'/>
   <flag name='screendump_device'/>
   <flag name='vhost-vsock'/>
diff --git a/tests/qemucapabilitiesdata/caps_6.0.0.x86_64.xml b/tests/qemucapabilitiesdata/caps_6.0.0.x86_64.xml
index 066e52697f..e9c6f9a3c6 100644
--- a/tests/qemucapabilitiesdata/caps_6.0.0.x86_64.xml
+++ b/tests/qemucapabilitiesdata/caps_6.0.0.x86_64.xml
@@ -120,7 +120,6 @@
   <flag name='tpm-crb'/>
   <flag name='pr-manager-helper'/>
   <flag name='qom-list-properties'/>
-  <flag name='memory-backend-file.discard-data'/>
   <flag name='screendump_device'/>
   <flag name='hda-output'/>
   <flag name='vmgenid'/>
diff --git a/tests/qemucapabilitiesdata/caps_6.1.0.x86_64.xml b/tests/qemucapabilitiesdata/caps_6.1.0.x86_64.xml
index 513817c15c..7e6a3616c9 100644
--- a/tests/qemucapabilitiesdata/caps_6.1.0.x86_64.xml
+++ b/tests/qemucapabilitiesdata/caps_6.1.0.x86_64.xml
@@ -119,7 +119,6 @@
   <flag name='tpm-crb'/>
   <flag name='pr-manager-helper'/>
   <flag name='qom-list-properties'/>
-  <flag name='memory-backend-file.discard-data'/>
   <flag name='screendump_device'/>
   <flag name='hda-output'/>
   <flag name='vmgenid'/>
diff --git a/tests/qemucapabilitiesdata/caps_6.2.0.aarch64.xml b/tests/qemucapabilitiesdata/caps_6.2.0.aarch64.xml
index 249bfcea54..a547b93546 100644
--- a/tests/qemucapabilitiesdata/caps_6.2.0.aarch64.xml
+++ b/tests/qemucapabilitiesdata/caps_6.2.0.aarch64.xml
@@ -101,7 +101,6 @@
   <flag name='nbd-tls'/>
   <flag name='pr-manager-helper'/>
   <flag name='qom-list-properties'/>
-  <flag name='memory-backend-file.discard-data'/>
   <flag name='screendump_device'/>
   <flag name='hda-output'/>
   <flag name='vhost-vsock'/>
diff --git a/tests/qemucapabilitiesdata/caps_6.2.0.ppc64.xml b/tests/qemucapabilitiesdata/caps_6.2.0.ppc64.xml
index 8626b28acb..9e39eaea5f 100644
--- a/tests/qemucapabilitiesdata/caps_6.2.0.ppc64.xml
+++ b/tests/qemucapabilitiesdata/caps_6.2.0.ppc64.xml
@@ -90,7 +90,6 @@
   <flag name='nbd-tls'/>
   <flag name='pr-manager-helper'/>
   <flag name='qom-list-properties'/>
-  <flag name='memory-backend-file.discard-data'/>
   <flag name='screendump_device'/>
   <flag name='hda-output'/>
   <flag name='vhost-vsock'/>
diff --git a/tests/qemucapabilitiesdata/caps_6.2.0.x86_64.xml b/tests/qemucapabilitiesdata/caps_6.2.0.x86_64.xml
index a3b66b344f..0ed9738f2c 100644
--- a/tests/qemucapabilitiesdata/caps_6.2.0.x86_64.xml
+++ b/tests/qemucapabilitiesdata/caps_6.2.0.x86_64.xml
@@ -119,7 +119,6 @@
   <flag name='tpm-crb'/>
   <flag name='pr-manager-helper'/>
   <flag name='qom-list-properties'/>
-  <flag name='memory-backend-file.discard-data'/>
   <flag name='screendump_device'/>
   <flag name='hda-output'/>
   <flag name='vmgenid'/>
diff --git a/tests/qemucapabilitiesdata/caps_7.0.0.aarch64.xml b/tests/qemucapabilitiesdata/caps_7.0.0.aarch64.xml
index 965e2da794..58426f96fa 100644
--- a/tests/qemucapabilitiesdata/caps_7.0.0.aarch64.xml
+++ b/tests/qemucapabilitiesdata/caps_7.0.0.aarch64.xml
@@ -101,7 +101,6 @@
   <flag name='nbd-tls'/>
   <flag name='pr-manager-helper'/>
   <flag name='qom-list-properties'/>
-  <flag name='memory-backend-file.discard-data'/>
   <flag name='screendump_device'/>
   <flag name='hda-output'/>
   <flag name='vhost-vsock'/>
diff --git a/tests/qemucapabilitiesdata/caps_7.0.0.ppc64.xml b/tests/qemucapabilitiesdata/caps_7.0.0.ppc64.xml
index 2a4cf7b100..3ba6d550aa 100644
--- a/tests/qemucapabilitiesdata/caps_7.0.0.ppc64.xml
+++ b/tests/qemucapabilitiesdata/caps_7.0.0.ppc64.xml
@@ -96,7 +96,6 @@
   <flag name='nbd-tls'/>
   <flag name='pr-manager-helper'/>
   <flag name='qom-list-properties'/>
-  <flag name='memory-backend-file.discard-data'/>
   <flag name='screendump_device'/>
   <flag name='hda-output'/>
   <flag name='vhost-vsock'/>
diff --git a/tests/qemucapabilitiesdata/caps_7.0.0.x86_64.xml b/tests/qemucapabilitiesdata/caps_7.0.0.x86_64.xml
index 7fb947b426..2ab4198e58 100644
--- a/tests/qemucapabilitiesdata/caps_7.0.0.x86_64.xml
+++ b/tests/qemucapabilitiesdata/caps_7.0.0.x86_64.xml
@@ -119,7 +119,6 @@
   <flag name='tpm-crb'/>
   <flag name='pr-manager-helper'/>
   <flag name='qom-list-properties'/>
-  <flag name='memory-backend-file.discard-data'/>
   <flag name='screendump_device'/>
   <flag name='hda-output'/>
   <flag name='vmgenid'/>
diff --git a/tests/qemucapabilitiesdata/caps_7.1.0.ppc64.xml b/tests/qemucapabilitiesdata/caps_7.1.0.ppc64.xml
index 85ac3b90d3..cfc56d42d3 100644
--- a/tests/qemucapabilitiesdata/caps_7.1.0.ppc64.xml
+++ b/tests/qemucapabilitiesdata/caps_7.1.0.ppc64.xml
@@ -95,7 +95,6 @@
   <flag name='nbd-tls'/>
   <flag name='pr-manager-helper'/>
   <flag name='qom-list-properties'/>
-  <flag name='memory-backend-file.discard-data'/>
   <flag name='screendump_device'/>
   <flag name='hda-output'/>
   <flag name='vhost-vsock'/>
diff --git a/tests/qemucapabilitiesdata/caps_7.1.0.x86_64.xml b/tests/qemucapabilitiesdata/caps_7.1.0.x86_64.xml
index 434e148eeb..1afbe830d0 100644
--- a/tests/qemucapabilitiesdata/caps_7.1.0.x86_64.xml
+++ b/tests/qemucapabilitiesdata/caps_7.1.0.x86_64.xml
@@ -119,7 +119,6 @@
   <flag name='tpm-crb'/>
   <flag name='pr-manager-helper'/>
   <flag name='qom-list-properties'/>
-  <flag name='memory-backend-file.discard-data'/>
   <flag name='screendump_device'/>
   <flag name='hda-output'/>
   <flag name='vmgenid'/>
diff --git a/tests/qemucapabilitiesdata/caps_7.2.0.x86_64.xml b/tests/qemucapabilitiesdata/caps_7.2.0.x86_64.xml
index a486c390cb..febb341d45 100644
--- a/tests/qemucapabilitiesdata/caps_7.2.0.x86_64.xml
+++ b/tests/qemucapabilitiesdata/caps_7.2.0.x86_64.xml
@@ -119,7 +119,6 @@
   <flag name='tpm-crb'/>
   <flag name='pr-manager-helper'/>
   <flag name='qom-list-properties'/>
-  <flag name='memory-backend-file.discard-data'/>
   <flag name='screendump_device'/>
   <flag name='hda-output'/>
   <flag name='vmgenid'/>