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 ('7c3e7721be0c00c04dcaaf5c27e4c4ed', -1, 1503379971, 1503379971, '365c8ec6', -11, 0, 0)

Line : 189
File : sessions.php