'null' string in m_analytics_models since MDL-64739

Go to site admin > analytics > analytics models Click on Actions > Edit for the Upcoming activities due model Save changes You SHOULD not see any debugging nor PHP notice Click on Actions > Edit for the Upcoming activities due model Save changes You SHOULD not see any debugging nor PHP notice Open your database client and execute the following query. No records should have a 'null' string in the contextids field select id, target, contextids from mdl_analytics_models;