bug#55136: keepassxc segfaults when merging databases

[raingloom]

Sorry, can't really send the database files, obviously.

Here is the error message instead.

```
failed to register FdoSecrets::Item(0x5596b3d47a20) at
"/org/freedesktop/secrets/collection/passes/c417f89606a5463fa0746d0a5f5625ba"
"Failed to register item on DBus at path
'/org/freedesktop/secrets/collection/passes/c417f89606a5463fa0746d0a5f5625ba'"
QObject::connect(Group, Unknown): invalid nullptr parameter
QObject::connect(FdoSecrets::Item, FdoSecrets::Collection): invalid
nullptr parameter QObject::connect(FdoSecrets::Item,
FdoSecrets::Collection): invalid nullptr parameter [1]    1425
segmentation fault  keepassxc
```