diff --git a/apps/hash-api/src/graph/ensure-system-graph-is-initialized/migrate-ontology-types/migrations/000-create-first-custom-data-types.migration.ts b/apps/hash-api/src/graph/ensure-system-graph-is-initialized/migrate-ontology-types/migrations/000-create-first-custom-data-types.migration.ts
index bf71a72ce47..9841e2ebac8 100644
--- a/apps/hash-api/src/graph/ensure-system-graph-is-initialized/migrate-ontology-types/migrations/000-create-first-custom-data-types.migration.ts
+++ b/apps/hash-api/src/graph/ensure-system-graph-is-initialized/migrate-ontology-types/migrations/000-create-first-custom-data-types.migration.ts
@@ -1,7 +1,4 @@
-import {
-  blockProtocolDataTypes,
-  systemDataTypes,
-} from "@local/hash-isomorphic-utils/ontology-type-ids";
+import { blockProtocolDataTypes } from "@local/hash-isomorphic-utils/ontology-type-ids";
 
 import type { MigrationFunction } from "../types";
 import { createSystemDataTypeIfNotExists } from "../util";
diff --git a/apps/hash-api/src/graph/ensure-system-graph-is-initialized/migrate-ontology-types/migrations/019-add-doc-company-and-person-types.migration.ts b/apps/hash-api/src/graph/ensure-system-graph-is-initialized/migrate-ontology-types/migrations/019-add-doc-company-and-person-types.migration.ts
index 7eff304472b..31da68036a4 100644
--- a/apps/hash-api/src/graph/ensure-system-graph-is-initialized/migrate-ontology-types/migrations/019-add-doc-company-and-person-types.migration.ts
+++ b/apps/hash-api/src/graph/ensure-system-graph-is-initialized/migrate-ontology-types/migrations/019-add-doc-company-and-person-types.migration.ts
@@ -1,7 +1,6 @@
 import {
   blockProtocolDataTypes,
   blockProtocolPropertyTypes,
-  systemDataTypes,
   systemPropertyTypes,
 } from "@local/hash-isomorphic-utils/ontology-type-ids";
 import { linkEntityTypeUrl } from "@local/hash-subgraph";