How to retire a knowledge block in ServiceNow

[RebeccaCiceri1]

Hello All, can someone help me understand why a knowledge block cannot be retired even if I have deleted it from the latest version of the article? I received always the same error message "Block cannot be retired as it is currently used in other articles".
See image attached as well.

[Kieran Anson]

Hi,

Has retirement of knowledge blocks been enabled? It is controlled by the property '

glide.knowman.allow_retire_block' which defaults to false.

The other place to look is within the m2m_kb_to_block_history, if this contains a record linking a knowledge block to an article then deletion will be prevented