Merge branch 'sales_1085311_FixDistrictValidFromMandatory' into '2021.1'

[Projekt: xRM-Sales][TicketNr.: 1085311][Gebietsdefinition ]

See merge request xrm/basic!1206

entity/DistrictResponsible_entity/DistrictResponsible_entity.aod

@@ -204,6 +204,7 @@
       <title>Valid from</title>
       <contentType>DATE</contentType>
       <resolution>DAY</resolution>
+      <mandatory v="true" />
     </entityField>
     <entityField>
       <name>VALID_UNTIL</name>