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https://waiseekweng.wordpress.com/2015/05/29/tf400018-the-local-version-table-for-the-local-workspace-pc-nameuser-could-not-be-opened-the-workspace-version-table-contains-an-unknown-schema-version/
TF400018: The local version table for the local workspace 'pc name';'user' could not be opened. The workspace version table contains an unknown schema version