diff --git a/src/main/java/org/gridsuite/modification/server/NetworkModificationController.java b/src/main/java/org/gridsuite/modification/server/NetworkModificationController.java
index ac91b8ab0..b8e6bddce 100644
--- a/src/main/java/org/gridsuite/modification/server/NetworkModificationController.java
+++ b/src/main/java/org/gridsuite/modification/server/NetworkModificationController.java
@@ -288,6 +288,6 @@ public ResponseEntity<Optional<NetworkModificationResult>> applyModifications(@P
                                                                                   @Parameter(description = "the report uuid") @RequestParam(value = "reportUuid", required = false) UUID reportUuid,
                                                                                   @Parameter(description = "the reporter id") @RequestParam(value = "reporterId", required = false) String reporterId,
                                                                                   @RequestBody List<UUID> modificationsUuidList) {
-        return ResponseEntity.ok().body(networkModificationService.applyModificationsFromUuids(networkUuid, variantId, new ReportInfos(reportUuid, UUID.fromString(reporterId)), modificationsUuidList));
+        return ResponseEntity.ok().body(networkModificationService.applyModificationsFromUuids(networkUuid, variantId, new ReportInfos(reportUuid, reporterId != null ? UUID.fromString(reporterId) : null), modificationsUuidList));
     }
 }
diff --git a/src/test/java/org/gridsuite/modification/server/ModificationControllerTest.java b/src/test/java/org/gridsuite/modification/server/ModificationControllerTest.java
index a562f4623..ee2c5bafa 100644
--- a/src/test/java/org/gridsuite/modification/server/ModificationControllerTest.java
+++ b/src/test/java/org/gridsuite/modification/server/ModificationControllerTest.java
@@ -1634,10 +1634,10 @@ public void testApplyModificationsFromUuids() throws Exception {
         assertNotNull(sw);
         assertFalse(sw.isOpen());  // switch is closed
 
-        // apply the modification on the network
+        // apply the modification on the network with a reporterId
         mvcResult = mockMvc.perform(
                 put("/v1/networks/" + TEST_NETWORK_ID + "/apply"
-                    + "?variantId=" + NetworkCreation.VARIANT_ID + "&reporterId=" + UUID.randomUUID().toString())
+                    + "?variantId=" + NetworkCreation.VARIANT_ID + "&reporterId=" + UUID.randomUUID())
                     .content(objectWriter.writeValueAsString(modificationUuidList))
                     .contentType(MediaType.APPLICATION_JSON))
             .andExpect(status().isOk()).andReturn();
@@ -1651,5 +1651,14 @@ public void testApplyModificationsFromUuids() throws Exception {
         assertEquals(modificationUuidList, newModificationUuidList);
 
         assertTrue(sw.isOpen());  // switch is opened
+
+        // apply the modification on the network without reporterId
+        mvcResult = mockMvc.perform(
+                put("/v1/networks/" + TEST_NETWORK_ID + "/apply"
+                    + "?variantId=" + NetworkCreation.VARIANT_ID)
+                    .content(objectWriter.writeValueAsString(modificationUuidList))
+                    .contentType(MediaType.APPLICATION_JSON))
+            .andExpect(status().isOk()).andReturn();
+        assertApplicationStatusOK(mvcResult);
     }
 }