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 ('d35b6d2b1422978f68ccaf1dd0bb5ce1', -1, 1490575432, 1490575432, '369d035c', -4, 0, 0)

Line : 189
File : sessions.php