phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'd15416f746a943c95429f58d5dcf7646' 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 ('d15416f746a943c95429f58d5dcf7646', -1, 1767117795, 1767117795, 'd849d82e', -4, 0, 0)

Line : 187
File : sessions.php