diff --git a/app/src/Lib/Traits/PrimaryLinkTrait.php b/app/src/Lib/Traits/PrimaryLinkTrait.php
index ba5afb7e5..83f6f7400 100644
--- a/app/src/Lib/Traits/PrimaryLinkTrait.php
+++ b/app/src/Lib/Traits/PrimaryLinkTrait.php
@@ -169,4 +169,15 @@ public function setPrimaryLink($field) {
       $this->primaryLinkTable = \Cake\Utility\Inflector::camelize(\Cake\Utility\Inflector::pluralize($f[1]));
     }
   }
+  
+  /**
+   * Set whether the primary link can be asserted directly.
+   * 
+   * @since  COmanage Match v1.0.0
+   * @param boolean $allowEmpty true if the primary link can be asserted directly
+   */
+  
+  public function setAllowUnkeyedPrimaryLink(array $actions) {
+    $this->unkeyedActions = array_merge($this->unkeyedActions, $actions);
+  }
 }
diff --git a/app/src/Model/Table/AttributeMappingsTable.php b/app/src/Model/Table/AttributeMappingsTable.php
index 762e3ee09..ab9d3a170 100644
--- a/app/src/Model/Table/AttributeMappingsTable.php
+++ b/app/src/Model/Table/AttributeMappingsTable.php
@@ -53,6 +53,7 @@ public function initialize(array $config) {
     $this->setDisplayField('query');
 
     $this->setPrimaryLink('attribute_map_id');
+    $this->setAllowUnkeyedPrimaryLink(['install']);
     $this->setRequiresMatchgrid(true);
   }