phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '997bc0f4e76f43c6ba4993477cc0d5e9' 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 ('997bc0f4e76f43c6ba4993477cc0d5e9', -1, 1765291089, 1765291089, 'd849d8bc', -4, 0, 0)

Line : 187
File : sessions.php