Latest version update problem

Hi, after updating to the latest version, the site is no longer accessible

During installation I get

Ouch! The installation is complete but GlobaLeaks failed to start.

and in the logs instead I find

2020-11-25 13:01:13+0100 [-] twistd 18.9.0 (/usr/bin/python3 3.8.5) starting up.
2020-11-25 13:01:13+0100 [-] reactor class: twisted.internet.epollreactor.EPollReactor.
2020-11-25 13:01:16+0100 [-] [E] Found an already initialized database version: 51
2020-11-25 13:01:16+0100 [-] [E] Performing schema migration from version 51 to version 53
2020-11-25 13:01:16+0100 [-] [I] Updating DB from version 51 to version 52
2020-11-25 13:01:16+0100 [-] [I] Migrating table:
2020-11-25 13:01:16+0100 [-] [I]  * Config [#109]
2020-11-25 13:01:16+0100 [-] [I]  * ConfigL10N [#72]
2020-11-25 13:01:16+0100 [-] [I]  * Context [#1]
2020-11-25 13:01:16+0100 [-] [I]  * CustomTexts [#1]
2020-11-25 13:01:16+0100 [-] [I]  * EnabledLanguage [#1]
2020-11-25 13:01:16+0100 [-] [I]  * Field [#99]
2020-11-25 13:01:16+0100 [-] [I]  * FieldAttr [#607]
2020-11-25 13:01:16+0100 [-] [I]  * FieldOption [#54]
2020-11-25 13:01:16+0100 [-] [I]  * File [#2]
2020-11-25 13:01:16+0100 [-] [I]  * Questionnaire [#2]
2020-11-25 13:01:16+0100 [-] [I]  * ReceiverContext [#1]
2020-11-25 13:01:16+0100 [-] [I]  * SubmissionStatus [#3]
2020-11-25 13:01:16+0100 [-] [I]  * Step [#5]
2020-11-25 13:01:16+0100 [-] [I]  * Tenant [#1]
2020-11-25 13:01:16+0100 [-] [I]  * User [#2]
2020-11-25 13:01:16+0100 [-] [E] Failure while executing migration epilogue: 'enable_private_labels'
2020-11-25 13:01:16+0100 [-] [E] Migration failure: 'enable_private_labels'
2020-11-25 13:01:16+0100 [-] [E] Verbose exception traceback:
2020-11-25 13:01:16+0100 [-] [I] Traceback (most recent call last):\n\n  File "/usr/lib/python3/dist-packages/globaleaks/db/__init__.py", line 88, in update_db\n    migr>
2020-11-25 13:01:16+0100 [-] Server Shut Down.

How can I solve? Thanks