phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1114 The table 'phpbb_sessions' is full

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('1a054c6dc999f9f7f25f03e3d407d3d4', -1, 1548201197, 1548201197, '36535d55', -4, 0, 0)

Line : 187
File : sessions.php