phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '15bdb6b4c0f99a6615c6573ba47406cd' for key 'phpbb_sessions.PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('15bdb6b4c0f99a6615c6573ba47406cd', -1, 1739246400, 1739246400, '0391029e', -4, 0, 0)

Line : 187
File : sessions.php