phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '017738b8a679fa6e780215f3df4ef251' 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 ('017738b8a679fa6e780215f3df4ef251', -1, 1768547722, 1768547722, 'd849d834', -4, 0, 0)

Line : 187
File : sessions.php