phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'b81b577f4a1e1a8eea67e63f49a58f54' 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 ('b81b577f4a1e1a8eea67e63f49a58f54', -1, 1762502106, 1762502106, 'd849d82e', 14, 0, 0)

Line : 187
File : sessions.php