Description of problem: In a closed VM detail page, when setting the memory, change "Maximum allocation" to not "128MB" firstly. Then, re-open the setting dialog, and set "Maximum allocation" to "128MB", the dialog could not be closed after clicking "Save" Version-Release number of selected components (if applicable): cockpit-machines-292-1.el8.noarch cockpit-292-1.el8.x86_64 libvirt-dbus-1.3.0-2.module+el8.8.0+16781+9f4724c2.x86_64 How reproducible: 100% Steps to Reproduce: 1 Create a closed VM, then enter the VM detail page 2 Change "Maximum allocation" to not "128MB" firstly 3 Re-open the setting dialog, and set "Maximum allocation" to "128MB", Actual results: 1 After step 3, the dialog could not be closed Expected results: 1 After step 3, the dialog could be closed Additional info: