diff --git a/.github/pull_request_template.md b/.github/pull_request_template.md
index 68eeeb4b6..e6a8dbc1f 100644
--- a/.github/pull_request_template.md
+++ b/.github/pull_request_template.md
@@ -64,7 +64,7 @@ Don't remove these lines, check them once done.
 -->
 - [ ] I have performed a self-review of my code
 - [ ] I have tested all changes I made on an iTop instance
-- [ ] Would a unit test be relevant and have I added it?
+- [ ] I have added a unit test, otherwise I have explained why I couldn't
 - [ ] Is the PR clear and detailled enough so anyone can understand digging in the code?
 
 ## Checklist of things to do before PR is ready to merge
diff --git a/datamodels/2.x/itop-structure/datamodel.itop-structure.xml b/datamodels/2.x/itop-structure/datamodel.itop-structure.xml
index f2b969da7..a462bcf0e 100644
--- a/datamodels/2.x/itop-structure/datamodel.itop-structure.xml
+++ b/datamodels/2.x/itop-structure/datamodel.itop-structure.xml
@@ -1482,7 +1482,10 @@
         </reconciliation>
       </properties>
       <fields>
-        <field id="file" xsi:type="AttributeBlob"/>
+        <field id="file" xsi:type="AttributeBlob">
+          <sql>file</sql>
+          <is_null_allowed>true</is_null_allowed>
+        </field>
       </fields>
       <methods>
         <method id="DisplayBareRelations">