Space export fails with error: "Couldn't backup database data"

Issue Summary

Space export fails with error: "Couldn't backup database data" same issue as closed bug report https://jira.atlassian.com/browse/CONFSERVER-40394

Steps to Reproduce

Have Confluence connected to SQL 2017
Have a relatively large space (with 1000+ deleted pages in MS SQL)
Go to Space Tools > Content Tools > Export > XML
Custom Export > Choose few pages
Export

Expected Results

Export was successful

Actual Results

Export was successful

Workaround

Exporting the whole space to XML works alright. As such, by copying the pages to a new (empty) Space, and exporting the entire new Space, the pages should be exported successfully.