1749962405

I have just downloaded Zotero 2.1. Now when i open my Thesis and try to add a reference it comes up with the following message:

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This item no longer exists in your Zotero database. Do you want to select a substitute item?

Clicking "No" will delete the field codes for citations containing this item, preserving the citation text but deleting it from your bibliography.
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The error report is 1749962405

I do not want to go over my whole document again and replace every single reeference by hadn. Any suggestions how I can fix this problem?

Also the add-in to insert references into my text now only had author and title in it, whereas before in zotero 2.0 i could customize by adding the date etc. Is this a new feature of zotero 2.1? If so how can i redownload version 2.0 which could allow me to look at dates?

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