diff --git a/api/v1/model/src/commonMain/kotlin/RuleViolation.kt b/api/v1/model/src/commonMain/kotlin/RuleViolation.kt
index a47a57abe..37334a4e4 100644
--- a/api/v1/model/src/commonMain/kotlin/RuleViolation.kt
+++ b/api/v1/model/src/commonMain/kotlin/RuleViolation.kt
@@ -29,5 +29,5 @@ data class RuleViolation(
     val severity: Severity,
     val message: String,
     val howToFix: String,
-    val packageId: Identifier?
+    val packageId: Identifier? = null
 )
diff --git a/core/src/test/kotlin/api/RunsRouteIntegrationTest.kt b/core/src/test/kotlin/api/RunsRouteIntegrationTest.kt
index a8385dc10..5e1e98a0b 100644
--- a/core/src/test/kotlin/api/RunsRouteIntegrationTest.kt
+++ b/core/src/test/kotlin/api/RunsRouteIntegrationTest.kt
@@ -1240,15 +1240,10 @@ class RunsRouteIntegrationTest : AbstractIntegrationTest({
                         "Message-3",
                         "How_to_fix-3"
                     ),
-                    // 2nd record after sort by "rule"
+                    // 2nd record after sort by "rule", without package identifier
                     OrtRuleViolation(
                         "a-Rule-4",
-                        Identifier(
-                            "Maven",
-                            "org.apache.test",
-                            "adv-loggger",
-                            "0.0.1-alpha"
-                        ),
+                        null,
                         "License-4",
                         "CONCLUDED",
                         Severity.WARNING,
@@ -1301,12 +1296,7 @@ class RunsRouteIntegrationTest : AbstractIntegrationTest({
                     ),
                     OrtRuleViolation(
                         "Rule-2-obsolete",
-                        Identifier(
-                            "Maven",
-                            "com.fasterxml.jackson.core.obsolete",
-                            "jackson-databind",
-                            "2.9.6"
-                        ),
+                        null,
                         "License-2-obsolete",
                         "DETECTED",
                         Severity.ERROR,
diff --git a/services/hierarchy/src/main/kotlin/RuleViolationService.kt b/services/hierarchy/src/main/kotlin/RuleViolationService.kt
index 7d7796495..fab27e1ea 100644
--- a/services/hierarchy/src/main/kotlin/RuleViolationService.kt
+++ b/services/hierarchy/src/main/kotlin/RuleViolationService.kt
@@ -47,7 +47,7 @@ class RuleViolationService(private val db: Database) {
                 val join = RuleViolationsTable innerJoin
                     EvaluatorRunsRuleViolationsTable innerJoin
                     EvaluatorRunsTable innerJoin
-                    EvaluatorJobsTable innerJoin
+                    EvaluatorJobsTable leftJoin
                     IdentifiersTable
 
                 join.select(
diff --git a/services/hierarchy/src/test/kotlin/RuleViolationServiceTest.kt b/services/hierarchy/src/test/kotlin/RuleViolationServiceTest.kt
index e43a4a557..c112eeb35 100644
--- a/services/hierarchy/src/test/kotlin/RuleViolationServiceTest.kt
+++ b/services/hierarchy/src/test/kotlin/RuleViolationServiceTest.kt
@@ -56,7 +56,7 @@ class RuleViolationServiceTest : WordSpec() {
                 val ortRun = createRuleViolationEntries()
                 val results = service.listForOrtRunId(ortRun.id).data
 
-                results shouldHaveSize 2
+                results shouldHaveSize 3
 
                 with(results[0]) {
 
@@ -90,6 +90,16 @@ class RuleViolationServiceTest : WordSpec() {
                         version shouldBe "2.9.6"
                     }
                 }
+
+                with(results[2]) {
+                    rule shouldBe "Rule-3-no-id"
+                    license shouldBe "License-3"
+                    licenseSource shouldBe "DETECTED"
+                    severity shouldBe Severity.HINT
+                    message shouldBe "Message-3"
+                    howToFix shouldBe "How_to_fix-3"
+                    packageId shouldBe null
+                }
             }
         }
     }
@@ -123,6 +133,15 @@ class RuleViolationServiceTest : WordSpec() {
                 Severity.ERROR,
                 "Message-2",
                 "How_to_fix-2"
+            ),
+            OrtRuleViolation(
+                "Rule-3-no-id",
+                null,
+                "License-3",
+                "DETECTED",
+                Severity.HINT,
+                "Message-3",
+                "How_to_fix-3"
             )
         )