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 ('524d90648f56e92577bbc7e761a3327f', -1, 1711658818, 1711658818, '345a32fc', 4, 0, 0)

Line : 187
File : sessions.php