They restored my email backup, but things went wrong

It seems like all my email are restored. I can see those missing emails (monday till thursday) appear back in my inbox. But something went wrong, on top the squirrel mail, it display something like this

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ERROR: Could not complete request.
Unknown response from IMAP server: 1.* NO Cannot open message 490 * NO Cannot open message 494 * NO Cannot open message 495 * NO Cannot open message 496 * NO Cannot open message 497 * NO Cannot open message 498 * NO Cannot open message 499 * NO Cannot open message 500 * NO Cannot open message 501 * NO Cannot open message 502 

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