Thank You, For this question I solved it , It is related into a space inside the Region Name leading space in the master table (Region) while the Region name in the detailed table (Customers) not have any leading space in their names.
Thank You, For this question I solved it , It is related into a space inside the Region Name leading space in the master table (Region) while the Region name in the detailed table (Customers) not have any leading space in their names.