fix: initialize group copies with right arguments (Pycord-Development#2331)

* fix: copy groups without callback

* chore: add changelog entry

Author: Dorukyum

CHANGELOG.md

@@ -215,6 +215,8 @@ These changes are available on the `master` branch, but have not yet been releas
   ([#2319](https://github.com/Pycord-Development/pycord/pull/2319))
 - Fixed `AttributeError` when comparing application commands with non-command objects.
   ([#2299](https://github.com/Pycord-Development/pycord/issues/2299))
+- Fixed `AttributeError` when copying groups on startup.
+  ([#2331](https://github.com/Pycord-Development/pycord/issues/2331))
 
 ## [2.4.1] - 2023-03-20
 

discord/commands/core.py

@@ -1444,7 +1444,7 @@ def _update_copy(self, kwargs: dict[str, Any]):
         if kwargs:
             kw = kwargs.copy()
             kw.update(self.__original_kwargs__)
-            copy = self.__class__(self.callback, **kw)
+            copy = self.__class__(**kw)
             return self._ensure_assignment_on_copy(copy)
         else:
             return self.copy()