solving error ”duplicate entry 0 for the key primary”

I faced this problem while tried to post data in the database.
It occurred because the Table had the Primary key as ID which was ”Default 0” and not even ”auto incremented”… for testing purpose in localhost, I just made it auto-increment and ”default” to ”none”.

But this is not always a solution for a database may be. the following links might help if it occurs again.

link 1
link 2


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