diff --git a/src/main/resources/update/1_3.sql b/src/main/resources/update/1_3.sql
index 00c020e..4227448 100644
--- a/src/main/resources/update/1_3.sql
+++ b/src/main/resources/update/1_3.sql
@@ -2,14 +2,3 @@
 
 ALTER TABLE REPOSITORY ADD COLUMN ORIGIN_USER_NAME VARCHAR(100);
 ALTER TABLE REPOSITORY ADD COLUMN ORIGIN_REPOSITORY_NAME VARCHAR(100);
-
-CREATE TABLE PULL_REQUEST(
-		PULL_REQUEST_ID INT AUTO_INCREMENT,
-		USER_NAME VARCHAR(100) NOT NULL,
-		REPOSITORY_NAME VARCHAR(100) NOT NULL,
-		ISSUE_ID INT NOT NULL,
-		COMMIT_ID VARCHAR(40) NOT NULL
-);
-
-ALTER TABLE PULL_REQUEST ADD CONSTRAINT IDX_PULL_REQUEST_PK PRIMARY KEY (PULL_REQUEST_ID);
-ALTER TABLE PULL_REQUEST ADD CONSTRAINT IDX_PULL_REQUEST_1 UNIQUE ISSUE (USER_NAME, REPOSITORY_NAME, ISSUE_ID);
diff --git a/src/main/resources/update/1_4.sql b/src/main/resources/update/1_4.sql
new file mode 100644
index 0000000..749e9aa
--- /dev/null
+++ b/src/main/resources/update/1_4.sql
@@ -0,0 +1,13 @@
+CREATE TABLE PULL_REQUEST(
+		PULL_REQUEST_ID INT AUTO_INCREMENT,
+		USER_NAME VARCHAR(100) NOT NULL,
+		REPOSITORY_NAME VARCHAR(100) NOT NULL,
+		ISSUE_ID INT NOT NULL,
+		REQUEST_USER_NAME VARCHAR(100) NOT NULL,
+		REQUEST_REPOSITORY_NAME VARCHAR(100) NOT NULL,
+		REQUEST_COMMIT_ID VARCHAR(40) NOT NULL
+);
+
+ALTER TABLE PULL_REQUEST ADD CONSTRAINT IDX_PULL_REQUEST_PK PRIMARY KEY (PULL_REQUEST_ID);
+ALTER TABLE PULL_REQUEST ADD CONSTRAINT IDX_PULL_REQUEST_FK0 FOREIGN KEY (USER_NAME, REPOSITORY_NAME, ISSUE_ID) REFERENCES ISSUE (USER_NAME, REPOSITORY_NAME, ISSUE_ID);
+ALTER TABLE PULL_REQUEST ADD CONSTRAINT IDX_PULL_REQUEST_FK1 FOREIGN KEY (REQUEST_USER_NAME, REQUEST_REPOSITORY_NAME) REFERENCES REPOSITORY (USER_NAME, REPOSITORY_NAME);
diff --git a/src/main/scala/model/PullRequest.scala b/src/main/scala/model/PullRequest.scala
index cce669d..950ebbf 100644
--- a/src/main/scala/model/PullRequest.scala
+++ b/src/main/scala/model/PullRequest.scala
@@ -4,10 +4,12 @@
 
 object PullRequests extends Table[PullRequest]("PULL_REQUEST") with IssueTemplate {
   def pullRequestId = column[Int]("PULL_REQUEST_ID")
-  def commitId = column[String]("COMMIT_ID")
-  def * = pullRequestId ~ userName ~ repositoryName ~ issueId ~ commitId <> (PullRequest, PullRequest.unapply _)
+  def requestUserName = column[String]("REQUEST_USER_NAME")
+  def requestRepositoryName = column[String]("REQUEST_REPOSITORY_NAME")
+  def requestCommitId = column[String]("REQUEST_COMMIT_ID")
+  def * = pullRequestId ~ userName ~ repositoryName ~ issueId ~ requestUserName ~ requestRepositoryName ~ requestCommitId <> (PullRequest, PullRequest.unapply _)
 
-  def autoinc = userName ~ repositoryName ~ issueId ~ commitId returning pullRequestId
+  def autoinc = userName ~ repositoryName ~ issueId ~ requestUserName ~ requestRepositoryName ~ requestCommitId returning pullRequestId
   def byPrimaryKey(pullRequestId: Int) = this.pullRequestId is pullRequestId.bind
 }
 
@@ -16,4 +18,6 @@
   userName: String,
   repositoryName: String,
   issueId: Int,
-  commitId: String)
\ No newline at end of file
+  requestUserName: String,
+  requestRepositoryName: String,
+  requestCommitId: String)
\ No newline at end of file