Unable to create Personal Circles

With the Circles version 0.20.2, we are unable to create Personal Circle.

Steps to reproduce :

1. Got to Circles
2. Click on Create a new circle
3. Choose a name for the circle
4. Select a circle type "Create a personal circle"
5. Click on Creation

An error pop up appears and in the log we have :
[circles] Fatal: {"type":"1","name":"Test_upgrade_20_bis","error":"An exception occurred while executing 'INSERT INTO "oc_circle_circles" ("creation", "unique_id", "long_id", "name", "alt_name", "description", "contact_addressbook", "contact_groupname", "settings", "type") VALUES(?, ?, ?, ?, ?, ?, ?, ?, ?, ?)' with params ["2021-03-12 09:04:08", "2228b76d41ec64", "2228b76d41ec645f73e9191895588aaa57374ee47b7b1354", "Test_upgrade_20_bis", "", "", 0, "", "[]", 1]:\n\nSQLSTATE[23505]: Unique violation: 7 ERROR: duplicate key value violates unique constraint "oc_circle_circles_pkey"\nDETAIL: Key (id)=(9) already exists."}

PUT /index.php/apps/circles/v1/circles

Start by reproducing the listed Circles 0.20.2 steps and inspect the PUT /index.php/apps/circles/v1/circles request alongside the PostgreSQL duplicate-key log. Trace why creating a personal circle attempts to reuse id 9; done means a personal circle is created successfully without the unique-constraint error.