phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '4b6c57a6f43dbd44d7c03141612a07bb' 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 ('4b6c57a6f43dbd44d7c03141612a07bb', -1, 1763807930, 1763807930, 'd849d826', -4, 0, 0)

Line : 187
File : sessions.php