phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '973564494bafee6ab891a2f7049b197a' 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 ('973564494bafee6ab891a2f7049b197a', -1, 1762494919, 1762494919, 'd849d82e', -9, 0, 0)

Line : 187
File : sessions.php