diff --git a/changelogs/fragments/52388-postgresqldatabase-fix-force-update.yml b/changelogs/fragments/52388-postgresqldatabase-fix-force-update.yml
new file mode 100644
index 00000000000..50e82408dfe
--- /dev/null
+++ b/changelogs/fragments/52388-postgresqldatabase-fix-force-update.yml
@@ -0,0 +1,2 @@
+bugfixes:
+  - azure_rm_postgresqldatabase - fix force_update bug (https://github.com/ansible/ansible/issues/50978).
diff --git a/lib/ansible/modules/cloud/azure/azure_rm_postgresqldatabase.py b/lib/ansible/modules/cloud/azure/azure_rm_postgresqldatabase.py
index 305a8fb7235..f758e99b7e4 100644
--- a/lib/ansible/modules/cloud/azure/azure_rm_postgresqldatabase.py
+++ b/lib/ansible/modules/cloud/azure/azure_rm_postgresqldatabase.py
@@ -146,6 +146,7 @@ class AzureRMDatabases(AzureRMModuleBase):
         self.resource_group = None
         self.server_name = None
         self.name = None
+        self.force_update = None
         self.parameters = dict()
 
         self.results = dict(changed=False)
@@ -200,6 +201,7 @@ class AzureRMDatabases(AzureRMModuleBase):
                 if not self.check_mode:
                     self.delete_postgresqldatabase()
             else:
+                self.fail("Database properties cannot be updated without setting 'force_update' option")
                 self.to_do = Actions.NoAction
 
         if (self.to_do == Actions.Create) or (self.to_do == Actions.Update):