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 ('d736d5829e35a1f4cedc0b05e7506f6e', -1, 1713515062, 1713515062, '038b68d6', 2, 0, 0)

Line : 187
File : sessions.php