diff --git a/backend/api/admin/data/spectrogram_analysis.py b/backend/api/admin/data/spectrogram_analysis.py
index c28595c15..f65b7bba8 100644
--- a/backend/api/admin/data/spectrogram_analysis.py
+++ b/backend/api/admin/data/spectrogram_analysis.py
@@ -14,7 +14,7 @@ def store_paths(analysis: SpectrogramAnalysis):
     # Only process one analysis
 
     relations_to_fill = analysis.spectrogram_relations.filter(
-        spectrogram_path__isnull=False,
+        spectrogram_path__isnull=True,
     )
     if analysis.legacy:
         for relation in relations_to_fill.all():
@@ -84,4 +84,5 @@ def store_paths(self, request, queryset: QuerySet[SpectrogramAnalysis]):
         """Store spectrogram and audio paths in database"""
         # Only process one analysis
         analysis = queryset.first()
-        store_paths(analysis=analysis)
+        if analysis is not None:
+            store_paths(analysis=analysis)
diff --git a/backend/api/admin/data/spectrogram_analysis_relation.py b/backend/api/admin/data/spectrogram_analysis_relation.py
index 0ca986b5b..362746eac 100644
--- a/backend/api/admin/data/spectrogram_analysis_relation.py
+++ b/backend/api/admin/data/spectrogram_analysis_relation.py
@@ -1,5 +1,6 @@
 """API data spectrogram analysis administration"""
 from django.contrib import admin
+from django.http import HttpRequest
 from django_extension.admin import ExtendedModelAdmin
 
 from backend.api.models import SpectrogramAnalysisRelation
@@ -17,3 +18,11 @@ class SpectrogramAnalysisRelationAdmin(ExtendedModelAdmin):
         "audio_path",
         "spectrogram_path",
     )
+
+    def has_add_permission(self, request: HttpRequest) -> bool:
+        return False
+
+    def has_change_permission(
+        self, request: HttpRequest, obj: SpectrogramAnalysisRelation | None = None
+    ) -> bool:
+        return False