diff --git a/persistence/0113_2.13.0_certificates.sql b/persistence/0113_2.13.0_certificates.sql
index 86aab556..fefdb3dd 100644
--- a/persistence/0113_2.13.0_certificates.sql
+++ b/persistence/0113_2.13.0_certificates.sql
@@ -75,6 +75,7 @@ CREATE TABLE IF NOT EXISTS client_certificates (
 CREATE INDEX IF NOT EXISTS idx_client_certificates_app_name ON client_certificates(app_name);
 CREATE INDEX IF NOT EXISTS idx_client_certificates_common_name ON client_certificates(common_name);
 CREATE INDEX IF NOT EXISTS idx_client_certificates_fingerprint ON client_certificates(fingerprint);
+CREATE UNIQUE INDEX IF NOT EXISTS idx_client_certificates_app_name_fingerprint ON client_certificates(app_name, fingerprint);
 
 -- Create security policies table for northbound app security management
 CREATE TABLE IF NOT EXISTS security_policies (