phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '51ddac4c11138b6918671f2b0ed50c86' for key 'PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('51ddac4c11138b6918671f2b0ed50c86', -1, 1714302766, 1714302766, '12dc01ef', 5, 0, 0)

Line : 187
File : sessions.php