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 ('1615f62142c9f484db0a9ecfee158e2a', -1, 1516192601, 1516192601, '36f2af62', 20, 0, 0)

Line : 186
File : sessions.php