phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'b4767b6b115bf3b9b4ee32fbcfbe5179' 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 ('b4767b6b115bf3b9b4ee32fbcfbe5179', -1, 1765038253, 1765038253, 'd849d8bc', -4, 0, 0)

Line : 187
File : sessions.php