diff --git a/api/src/prescription/learner-management/application/http-error-mapper-configuration.js b/api/src/prescription/learner-management/application/http-error-mapper-configuration.js
index 989d60fdc45..9e000b7e44f 100644
--- a/api/src/prescription/learner-management/application/http-error-mapper-configuration.js
+++ b/api/src/prescription/learner-management/application/http-error-mapper-configuration.js
@@ -1,5 +1,5 @@
 import { HttpErrors } from '../../../shared/application/http-errors.js';
-import { AggregateImportError } from '../domain/errors.js';
+import { AggregateImportError, CouldNotDeleteLearnersError } from '../domain/errors.js';
 
 const learnerManagementDomainErrorMappingConfiguration = [
   {
@@ -8,6 +8,12 @@ const learnerManagementDomainErrorMappingConfiguration = [
       return new HttpErrors.PreconditionFailedError(error.message, error.code, error.meta);
     },
   },
+  {
+    name: CouldNotDeleteLearnersError.name,
+    httpErrorFn: (error) => {
+      return new HttpErrors.PreconditionFailedError(error.message);
+    },
+  },
 ];
 
 export { learnerManagementDomainErrorMappingConfiguration };
diff --git a/api/src/prescription/learner-management/application/organization-learners-route.js b/api/src/prescription/learner-management/application/organization-learners-route.js
index 54d4e712425..7c76aba0b00 100644
--- a/api/src/prescription/learner-management/application/organization-learners-route.js
+++ b/api/src/prescription/learner-management/application/organization-learners-route.js
@@ -27,7 +27,7 @@ const register = async (server) => {
         ],
         validate: {
           params: Joi.object({
-            id: identifiersType.organizationId,
+            organizationId: identifiersType.organizationId,
           }),
           payload: Joi.object({
             listLearners: Joi.array().required().items(Joi.number().required()),
@@ -152,7 +152,7 @@ const register = async (server) => {
         handler: organizationLearnersController.dissociate,
         validate: {
           params: Joi.object({
-            organizationId: identifiersType.organizationLearnerId,
+            id: identifiersType.organizationLearnerId,
           }),
         },
         notes: [
diff --git a/api/src/prescription/learner-management/domain/errors.js b/api/src/prescription/learner-management/domain/errors.js
index 02b8f1ae740..10d4bb40bf2 100644
--- a/api/src/prescription/learner-management/domain/errors.js
+++ b/api/src/prescription/learner-management/domain/errors.js
@@ -41,8 +41,15 @@ class ReconcileCommonOrganizationLearnerError extends DomainError {
   }
 }
 
+class CouldNotDeleteLearnersError extends DomainError {
+  constructor() {
+    super(`Could not delete the following organization learners.`);
+  }
+}
+
 export {
   AggregateImportError,
+  CouldNotDeleteLearnersError,
   OrganizationDoesNotHaveFeatureEnabledError,
   OrganizationLearnerImportFormatNotFoundError,
   OrganizationLearnersCouldNotBeSavedError,
diff --git a/api/src/prescription/learner-management/domain/models/OrganizationLearnerList.js b/api/src/prescription/learner-management/domain/models/OrganizationLearnerList.js
index a0284a278d3..f0b31baba00 100644
--- a/api/src/prescription/learner-management/domain/models/OrganizationLearnerList.js
+++ b/api/src/prescription/learner-management/domain/models/OrganizationLearnerList.js
@@ -1,4 +1,5 @@
 import { logger } from '../../../../shared/infrastructure/utils/logger.js';
+import { CouldNotDeleteLearnersError } from '../errors.js';
 
 class OrganizationLearnerList {
   constructor({ organizationId, organizationLearnerIds } = {}) {
@@ -13,7 +14,7 @@ class OrganizationLearnerList {
       logger.error(
         `User id ${userId} could not delete organization learners because learner id ${result} don't belong to organization id ${this.organizationId} "`,
       );
-      throw new Error('Could not delete organization learners.');
+      throw new CouldNotDeleteLearnersError();
     }
   }
 }
diff --git a/api/src/prescription/learner-management/domain/usecases/delete-organization-learners.js b/api/src/prescription/learner-management/domain/usecases/delete-organization-learners.js
index 8850bf99a14..260c39afcf0 100644
--- a/api/src/prescription/learner-management/domain/usecases/delete-organization-learners.js
+++ b/api/src/prescription/learner-management/domain/usecases/delete-organization-learners.js
@@ -7,15 +7,14 @@ const deleteOrganizationLearners = async function ({
   organizationLearnerRepository,
   campaignParticipationRepository,
 }) {
-  const learnersBelogingToOrganization = await organizationLearnerRepository.findOrganizationLearnerIdsByOrganizationId(
-    {
+  const organizationLearnerIdsFromOrganization =
+    await organizationLearnerRepository.findOrganizationLearnerIdsByOrganizationId({
       organizationId,
-    },
-  );
+    });
 
   const organizationLearnerList = new OrganizationLearnerList({
     organizationId,
-    organizationLearnerIds: learnersBelogingToOrganization,
+    organizationLearnerIds: organizationLearnerIdsFromOrganization,
   });
 
   organizationLearnerList.canDeleteOrganizationLearners(organizationLearnerIds, userId);
diff --git a/api/tests/prescription/learner-management/unit/domain/models/OrganizationLearnerList_test.js b/api/tests/prescription/learner-management/unit/domain/models/OrganizationLearnerList_test.js
index 5b66b67f80e..8b0d2b13dc7 100644
--- a/api/tests/prescription/learner-management/unit/domain/models/OrganizationLearnerList_test.js
+++ b/api/tests/prescription/learner-management/unit/domain/models/OrganizationLearnerList_test.js
@@ -1,3 +1,4 @@
+import { CouldNotDeleteLearnersError } from '../../../../../../src/prescription/learner-management/domain/errors.js';
 import { OrganizationLearnerList } from '../../../../../../src/prescription/learner-management/domain/models/OrganizationLearnerList.js';
 import { catchErrSync, expect } from '../../../../../test-helper.js';
 
@@ -31,7 +32,7 @@ describe('Unit | Models | OrganizationLearnerListFormat', function () {
         userId,
       );
 
-      expect(result).to.be.instanceof(Error);
+      expect(result).to.be.instanceof(CouldNotDeleteLearnersError);
     });
 
     it('should not throw when lists are identical', function () {