phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 'session_user_id'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('9eaf3d9e63d6b2e0465f51ad2a14ead3', -1, 1571222449, 1571222449, '22ccbf1f', -10, 0, 0)

Line : 191
File : sessions.php