phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '7d46c8f7e7ba3461704478ad6aa40bfd' 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 ('7d46c8f7e7ba3461704478ad6aa40bfd', -1, 1770705480, 1770705480, 'd849d88f', -4, 0, 0)

Line : 187
File : sessions.php