Cause:
This can be for one of the following three reasons:
1. There's a bug in the code and the developer did not realise that you could get more than one row returned;
2. The data has been hacked rather than using the API so that validation has been broken;
3. The software is OK, what the user did was OK, but two parallel updates occurred at the same time and neither could see the uncommitted change that the other did - hence not validated correctly.
2. The data has been hacked rather than using the API so that validation has been broken;
3. The software is OK, what the user did was OK, but two parallel updates occurred at the same time and neither could see the uncommitted change that the other did - hence not validated correctly.
4.The number specified in exact fetch is less than the rows returned.
Action:
Rewrite the query or change number of rows requested
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