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 ('306607ad5f763ff63cc71e2cbaf25c98', -1, 1511367840, 1511367840, '36c40283', 25, 0, 0)

Line : 211
File : sessions.php