In my program, there is a field Lot Numbers
having lenght 3 digits....so records come only till 999.....
now i want that lenght converted to 4 digits, because
i already used till 999 and want to use 1000 and so on....
I go to in my ztable and change its field length, it
changed successfully....but when i craeting new entries in 4 digits like 1000, 1001 and so on, not taking and giving error
message that "An entry already exists with the same key"...
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