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 ('8db2b5b5534aa6b779f4e9d8305984b2', -1, 1475119262, 1475119262, '36f20961', 0, 0, 0)

Line : 172
File : sessions.php