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 ('8ff5e57b7e7d75a001c90e20c1fa426a', -1, 1490242208, 1490242208, '36cd9fa8', 0, 0, 0)

Line : 187
File : sessions.php