diff --git a/dao/src/main/java/org/thingsboard/server/dao/device/DeviceProfileServiceImpl.java b/dao/src/main/java/org/thingsboard/server/dao/device/DeviceProfileServiceImpl.java
index a5b3e56341..391695f2bf 100644
--- a/dao/src/main/java/org/thingsboard/server/dao/device/DeviceProfileServiceImpl.java
+++ b/dao/src/main/java/org/thingsboard/server/dao/device/DeviceProfileServiceImpl.java
@@ -160,9 +160,12 @@ public class DeviceProfileServiceImpl extends AbstractCachedEntityService<Device
             handleEvictEvent(new DeviceProfileEvictEvent(deviceProfile.getTenantId(), deviceProfile.getName(),
                     oldDeviceProfile != null ? oldDeviceProfile.getName() : null, null, deviceProfile.isDefault(),
                     oldDeviceProfile != null ? oldDeviceProfile.getProvisionDeviceKey() : null));
+            String unqProvisionKeyErrorMsg = DeviceProfileProvisionType.X509_CERTIFICATE_CHAIN.equals(deviceProfile.getProvisionType())
+                    ? "Device profile with such certificate already exists!"
+                    : "Device profile with such provision device key already exists!";
             checkConstraintViolation(t,
                     Map.of("device_profile_name_unq_key", DEVICE_PROFILE_WITH_SUCH_NAME_ALREADY_EXISTS,
-                            "device_provision_key_unq_key", "Device profile with such provision device key already exists!",
+                            "device_provision_key_unq_key", unqProvisionKeyErrorMsg,
                             "device_profile_external_id_unq_key", "Device profile with such external id already exists!"));
             throw t;
         }
diff --git a/ui-ngx/src/app/modules/home/components/profile/device-profile-provision-configuration.component.ts b/ui-ngx/src/app/modules/home/components/profile/device-profile-provision-configuration.component.ts
index 54a9b98aa5..3387d71704 100644
--- a/ui-ngx/src/app/modules/home/components/profile/device-profile-provision-configuration.component.ts
+++ b/ui-ngx/src/app/modules/home/components/profile/device-profile-provision-configuration.component.ts
@@ -107,7 +107,7 @@ export class DeviceProfileProvisionConfigurationComponent implements ControlValu
         }
         const certificateRegExPattern: string = this.provisionConfigurationFormGroup.get('certificateRegExPattern').value;
         if (!certificateRegExPattern || !certificateRegExPattern.length) {
-          this.provisionConfigurationFormGroup.get('certificateRegExPattern').patchValue('[\\w]*', {emitEvent: false});
+          this.provisionConfigurationFormGroup.get('certificateRegExPattern').patchValue('(.*)', {emitEvent: false});
         }
         const allowCreateNewDevicesByX509Certificate: boolean | null = this.provisionConfigurationFormGroup.get('allowCreateNewDevicesByX509Certificate').value;
         if (!isBoolean(allowCreateNewDevicesByX509Certificate)) {