phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '1fdeb05a2ef753ee6b6bf11656856dbc' 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 ('1fdeb05a2ef753ee6b6bf11656856dbc', -1, 1772874101, 1772874101, 'd849d860', 26, 0, 0)

Line : 187
File : sessions.php