TT#31179 clean duplicate "lock" pref values

created by enum_set_default trigger

Change-Id: I6a84f808223bb5871fb93f0ea3b98945fbd2d91b

db_scripts/diff/15381.up

@@ -0,0 +1,4 @@
+use provisioning;
+
+delete v from voip_usr_preferences v join voip_preferences a on v.attribute_id = a.id
+  where a.attribute="lock" and (v.value is null or v.value="0" or length(trim(v.value)) = 0);