diff --git a/src/distribution/distribution.service.ts b/src/distribution/distribution.service.ts
index 6531eaa..199ba72 100644
--- a/src/distribution/distribution.service.ts
+++ b/src/distribution/distribution.service.ts
@@ -592,10 +592,11 @@ export class DistributionService {
                     }
                 }
             } catch (error) {
-                const firstFingerprint = relaysWithFamilyUpdates.at(0)
+                const firstFingerprint =
+                    relaysWithFamilyUpdates.at(0)?.fingerprint
                 const lastFingerprint = relaysWithFamilyUpdates.at(
                     relaysWithFamilyUpdates.length - 1
-                )
+                )?.fingerprint
                 this.logger.error(
                     `Exception setting relay families for`
                     + ` ${relaysWithFamilyUpdates.length} relays`
diff --git a/src/verification/verification.service.ts b/src/verification/verification.service.ts
index c124561..ddaa0e2 100644
--- a/src/verification/verification.service.ts
+++ b/src/verification/verification.service.ts
@@ -642,10 +642,11 @@ export class VerificationService {
                     }
                 }
             } catch (error) {
-                const firstFingerprint = relaysWithFamilyUpdates.at(0)
+                const firstFingerprint =
+                    relaysWithFamilyUpdates.at(0)?.fingerprint
                 const lastFingerprint = relaysWithFamilyUpdates.at(
                     relaysWithFamilyUpdates.length - 1
-                )
+                )?.fingerprint
                 this.logger.error(
                     `Exception setting relay families for`
                     + ` ${relaysWithFamilyUpdates.length} relays`