diff --git a/pylib/anki/collection.py b/pylib/anki/collection.py
index aa1bf4cfd..cacef5f3e 100644
--- a/pylib/anki/collection.py
+++ b/pylib/anki/collection.py
@@ -251,6 +251,7 @@ crt=?, mod=?, scm=?, dty=?, usn=?, ls=?""",
                 raise AnkiError("abortSchemaMod")
         self.scm = intTime(1000)
         self.setMod()
+        self.save()
 
     def schemaChanged(self) -> Any:
         "True if schema changed since last sync."
diff --git a/qt/aqt/deckconf.py b/qt/aqt/deckconf.py
index 509462e51..b3f75ea30 100644
--- a/qt/aqt/deckconf.py
+++ b/qt/aqt/deckconf.py
@@ -131,15 +131,16 @@ class DeckConf(QDialog):
         # then reload the conf list
         self.loadConfs()
 
-    def remGroup(self):
+    def remGroup(self) -> None:
         if int(self.conf["id"]) == 1:
             showInfo(_("The default configuration can't be removed."), self)
         else:
+            self.mw.col.modSchema(check=True)
             self.mw.col.decks.remove_config(self.conf["id"])
             self.deck["conf"] = 1
             self.loadConfs()
 
-    def renameGroup(self):
+    def renameGroup(self) -> None:
         old = self.conf["name"]
         name = getOnlyText(_("New name:"), default=old)
         if not name or name == old: