phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'b4b6fc7c0a1458cc5487ca9592e0c0fc' 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 ('b4b6fc7c0a1458cc5487ca9592e0c0fc', -1, 1767287574, 1767287574, 'd849d82e', -9, 0, 0)

Line : 187
File : sessions.php