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 ('74dcb2c01f5e13419a8e3fe1a8e0d69a', -1, 1713613296, 1713613296, '0387c631', 5, 0, 0)

Line : 187
File : sessions.php