diff --git a/src/main/resources/update/1_0.sql b/src/main/resources/update/1_0.sql
index e950110..e85b2b0 100644
--- a/src/main/resources/update/1_0.sql
+++ b/src/main/resources/update/1_0.sql
@@ -100,7 +100,6 @@
 ALTER TABLE ISSUE_COMMENT ADD CONSTRAINT IDX_ISSUE_COMMENT_FK0 FOREIGN KEY (USER_NAME, REPOSITORY_NAME, ISSUE_ID) REFERENCES ISSUE (USER_NAME, REPOSITORY_NAME, ISSUE_ID);
 
 ALTER TABLE LABEL ADD CONSTRAINT IDX_LABEL_PK PRIMARY KEY (USER_NAME, REPOSITORY_NAME, LABEL_ID);
-ALTER TABLE LABEL ADD CONSTRAINT IDX_LABEL_1 UNIQUE (USER_NAME, REPOSITORY_NAME, LABEL);
 ALTER TABLE LABEL ADD CONSTRAINT IDX_LABEL_FK0 FOREIGN KEY (USER_NAME, REPOSITORY_NAME) REFERENCES REPOSITORY (USER_NAME, REPOSITORY_NAME);
 
 ALTER TABLE ISSUE_LABEL ADD CONSTRAINT IDX_ISSUE_LABEL_PK PRIMARY KEY (USER_NAME, REPOSITORY_NAME, ISSUE_ID, LABEL_ID);