Removing and re-adding Bibucket cloud account in DVCS accounts results in "Invalid credentials, please reset OAuth settings"

Issue Summary

Removing and re-adding Bibucket cloud account in DVCS accounts results in "Invalid credentials, please reset OAuth settings"

Steps to Reproduce

1. Run Jira Software 8.6.0 on PostgreSQL 10.10 or 11.5
2. Add Bitbucket cloud account in "DVCS Accounts" admin section
3. Remove this account
4. Try to add this account again with new OAuth details

Expected Results

The account is properly linked

Actual Results

"Invalid credentials, please reset OAuth settings" message is displayed

Workaround

Currently there is no known workaround for this behavior. A workaround will be added here when available