Transaction Rollback Error: DeadLock Detected

Hello Everyone,


Here I have got and error of concurrent update,
Transaction Rollback Error: deadlock detected
process 4801 waits for sharelock on transaction 944461 blocked by process
4700.
process 4700 waits for sharelock on transaction 9444665 blocked by process
4801.
by default PostgreSQL server has to abort one transaction and proceed the
other one, in my case it did not.


Solutions will highly appreciated



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