Deleteing Parts Records - is this a bug?

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Hi all,
I'm loading Parts records in via a CSV file. The problem I have is when
I delete a record, either using LedgerSMB or phppgadmin, the details
disappear as expected, but the id seems to be retained, meaning I cannot
delete the data and re-load it after finding an error as the Id field
causes a key error.

Any ideas?

Cheers
Richard