[minor] fix for rename_doc

frappe/model/rename_doc.py

@@ -89,12 +89,16 @@ def rename_parent_and_child(doctype, old, new, meta):
 
 def validate_rename(doctype, new, meta, merge, force, ignore_permissions):
 	# using for update so that it gets locked and someone else cannot edit it while this rename is going on!
-	exists = frappe.db.sql("select name from `tab{doctype}` where name=%s COLLATE utf8mb4_unicode_ci for update".format(doctype=frappe.db.escape(doctype)), new)
+	exists = frappe.db.sql("select name from `tab{doctype}` where name=%s for update".format(doctype=frappe.db.escape(doctype)), new)
 	exists = exists[0][0] if exists else None
 
 	if merge and not exists:
 		frappe.msgprint(_("{0} {1} does not exist, select a new target to merge").format(doctype, new), raise_exception=1)
 
+	if exists and exists != new:
+		# for fixing case, accents
+		exists = None
+
 	if (not merge) and exists:
 		frappe.msgprint(_("Another {0} with name {1} exists, select another name").format(doctype, new), raise_exception=1)