concrete5/concrete5 — pull request #987 by mkly (2013-03-19 00:47:50+00:00)
Title: Check for Table and Column Before Changing

- Check for Table `CollectionVersionBlocksOutputCache` before `truncate`
call
- Check for Column `btCachedBlockRecord` before `set`

Correct error while upgrading to 5.6.1 as `btCachedBlockRecord` does not
exist