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 ('310b4b6964ce094a5242d97b26e90e9f', -1, 1713277954, 1713277954, '038df4c9', -7, 0, 0)

Line : 187
File : sessions.php