Problem with adding drawings into vault

So we just added some legacy drawings into the vault.

They added just fine, however they didn't get a part number, and they didn't have any sheets on their data card.

Usually there is an @ tab and then Sheet1, Sheet2, etc these drawings only had the @ tab.

The parts that were added to the vault along with the drawings all got part numbers.

Anyone know why this happened?

Thanks,

Laura

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