Getting MySQL error when rebuilding sitemap

I get the following error when rebuilding the sitemap:

Drupal\Core\Database\DatabaseExceptionWrapper: SQLSTATE[22001]: String data, right truncated: 1406 Data too long for column'loc' at row 1: INSERT INTO {xmlsitemap} (type, id, loc, subtype, access, status, status_override, lastmod, priority,
priority_override, changefreq, changecount, language) VALUES (:db_insert_placeholder_0, :db_insert_placeholder_1,
:db_insert_placeholder_2, :db_insert_placeholder_3, :db_insert_placeholder_4, :db_insert_placeholder_5, :db_insert_placeholder_6,
:db_insert_placeholder_7, :db_insert_placeholder_8, :db_insert_placeholder_9, :db_insert_placeholder_10,
:db_insert_placeholder_11, :db_insert_placeholder_12); Array
(
    [:db_insert_placeholder_0] => file
    [:db_insert_placeholder_1] => 271
    [:db_insert_placeholder_2] =>
Very-long-url.jpg
    [:db_insert_placeholder_3] => file
    [:db_insert_placeholder_4] => 1
    [:db_insert_placeholder_5] => 0
    [:db_insert_placeholder_6] => 0
    [:db_insert_placeholder_7] => 1477246520
    [:db_insert_placeholder_8] => 0.5
    [:db_insert_placeholder_9] => 0
    [:db_insert_placeholder_10] => 0
    [:db_insert_placeholder_11] => 0
    [:db_insert_placeholder_12] => en
)