phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '8a1f1ef8973e92218a31fe740e37bdb7' 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 ('8a1f1ef8973e92218a31fe740e37bdb7', -1, 1758625655, 1758625655, 'd849d80a', -4, 0, 0)

Line : 187
File : sessions.php