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 ('c5ac2c006841486abf68d472e8d87faf', -1, 1714017941, 1714017941, '12d9c227', -1, 0, 0)

Line : 187
File : sessions.php