Hi,
We have made provision to use field - External service no- to manually input some number for reference in the line item tab in ML81N. This number is used to track LR no for internal usage. There will be s separate number in each line item. Since this is a text field, system does not check for duplicate entries.
We want a functionality to validate already entered number. If the number is repeated, system should not allow it.
Please suggest.
Regards,
Rutwik
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