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 ('2f09e25c7b936318a7670dd9a798bbfa', -1, 1713961715, 1713961715, '0310515e', -8, 0, 0)

Line : 187
File : sessions.php