-- System Information --

Platform: 		Windows XP
Version: 		5.1
Build: 		2600 Service Pack 1

-- Application Information --

Name: 		pgAdmin II
Version: 		1.6.0
Descripton: 	

Name: 		pgSchema
Version: 		1.6.0
Descripton: 	PostgreSQL Schema Objects v1.6.0

-- Database Information --

Version: 		7.3.2
Descripton: 	PostgreSQL 7.3.2 on i386-redhat-linux-gnu, compiled by GCC
i386-redhat-linux-gcc (GCC) 3.2.2 20030213 (Red Hat Linux 8.0 3.2.2-1)

-- Driver Information --

Name: 		PostgreSQL
Version: 		7.3.100
Descripton: 	PostgreSQL 7.3.2 on i386-redhat-linux-gnu, compiled by GCC
i386-redhat-linux-gcc (GCC) 3.2.2 20030213 (Red Hat Linux

-- Error Information --

Description: 	ERROR:  UNIQUE constraint matching given keys for referenced
table "item" not found
Number: 		-2147467259
Routine: 		pgAdmin II:frmTable.cmdOK_Click

************************************************************

Insert your comment:
Im having trouble creating foreign key for this table (itemsupp) both have
itemcode column but when I created this error occur telling UNIQUE contraint
matching. What shall I do?