Updating a term with Panelizer enabled for that term causes SQL constraint violation

 PDOException: SQLSTATE[23000]: Integrity constraint violation: 1062 Duplicate entry 'taxonomy_term-520-0-page_manager' for key 'PRIMARY': INSERT INTO {panelizer_entity} (entity_type, entity_id, revision_id, name, no_blocks, css_id, css, pipeline, contexts, relationships, did, view_mode, css_class, title_element, link_to_entity, extra) VALUES (
:db_insert_placeholder_0, :db_insert_placeholder_1, :db_insert_placeholder_2, :db_insert_placeholder_3, :db_insert_placeholder_4, :d
b_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, :db_insert_placeholder_13, :db_insert_placeholder_14, :
db_insert_placeholder_15); Array
(
[:db_insert_placeholder_0] => taxonomy_term
[:db_insert_placeholder_1] => 520
[:db_insert_placeholder_2] => 0
[:db_insert_placeholder_3] => taxonomy_term:topics:default
[:db_insert_placeholder_4] => 0
[:db_insert_placeholder_5] => 
[:db_insert_placeholder_6] => 
[:db_insert_placeholder_7] => standard
[:db_insert_placeholder_8] => a:0:{}
[:db_insert_placeholder_9] => a:0:{}
[:db_insert_placeholder_10] => 0
[:db_insert_placeholder_11] => page_manager
[:db_insert_placeholder_12] => 
[:db_insert_placeholder_13] => H2
[:db_insert_placeholder_14] => 1
[:db_insert_placeholder_15] => s:0:"";
)
in drupal_write_record() (line 7106 of /home/sam/www/gateway/docroot/includes/common.inc).