phpBB : Critical Error

Error creating new session

DEBUG MODE

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

INSERT INTO sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('816e79df8f156ecde90834dd51646427', -1, 1715038939, 1715038939, '12e0f6cb', -6, 0, 0)

Line : 189
File : sessions.php