Fatal error: Uncaught mysqli_sql_exception: Duplicate entry 'variables' for key 'PRIMARY' in /home/u/ums20/ums20.ru/public_html/includes/database.mysqli.inc:114
Stack trace:
#0 /home/u/ums20/ums20.ru/public_html/includes/database.mysqli.inc(114): mysqli_query(Object(mysqli), 'INSERT INTO `ca...')
#1 /home/u/ums20/ums20.ru/public_html/includes/database.mysql-common.inc(42): _db_query('INSERT INTO `ca...')
#2 /home/u/ums20/ums20.ru/public_html/includes/cache.inc(114): db_query('INSERT INTO `ca...', 'variables', 'a:201:{s:11:"ad...', 1784355092, 0, NULL, 1)
#3 /home/u/ums20/ums20.ru/public_html/includes/bootstrap.inc(571): cache_set('variables', 'a:201:{s:11:"ad...')
#4 /home/u/ums20/ums20.ru/public_html/includes/bootstrap.inc(1188): variable_init(Array)
#5 /home/u/ums20/ums20.ru/public_html/includes/bootstrap.inc(1122): _drupal_bootstrap(5)
#6 /home/u/ums20/ums20.ru/public_html/index.php(18): drupal_bootstrap(8)
#7 {main}
  thrown in /home/u/ums20/ums20.ru/public_html/includes/database.mysqli.inc on line 114