diff --git a/base/src/org/compiere/model/MColumn.java b/base/src/org/compiere/model/MColumn.java
index 5a71e148c4..bcd7b96252 100644
--- a/base/src/org/compiere/model/MColumn.java
+++ b/base/src/org/compiere/model/MColumn.java
@@ -213,6 +213,22 @@ public class MColumn extends X_AD_Column
 		WHERE AD_Table_ID IN (SELECT AD_Table_ID FROM AD_Table WHERE IsView='Y')
 		**/
 		
+		/* Diego Ruiz - globalqss - BF [1651899] - AD_Column: Avoid dup. SeqNo for IsIdentifier='Y' */
+		if (isIdentifier())
+		{
+			int cnt = DB.getSQLValue(get_TrxName(),"SELECT COUNT(*) FROM AD_Column "+
+					"WHERE AD_Table_ID=?"+
+					" AND AD_Column_ID!=?"+
+					" AND IsIdentifier='Y'"+
+					" AND SeqNo=?",
+					new Object[] {getAD_Table_ID(), getAD_Column_ID(), getSeqNo()});
+			if (cnt>0)
+			{
+				log.saveError("SaveErrorNotUnique", Msg.getElement(getCtx(), COLUMNNAME_SeqNo));
+				return false;
+			}
+		}
+		
 		//	Virtual Column
 		if (isVirtualColumn())
 		{