diff --git a/lib/util/mongo.cjs b/lib/util/mongo.cjs
index 83389e6d..7eeb9695 100644
--- a/lib/util/mongo.cjs
+++ b/lib/util/mongo.cjs
@@ -20,13 +20,13 @@ class Mongo {
   async createIndexes() {
     await this.db.collection('voies').createIndex({codeCommune: 1})
     await this.db.collection('voies').createIndex({idVoie: 1}, {unique: true})
-    await this.db.collection('voies').createIndex({banId: 1}, {unique: true})
+    await this.db.collection('voies').createIndex({banId: 1})
     await this.db.collection('voies').createIndex({banIdDistrict: 1})
     await this.db.collection('voies').createIndex({tiles: 1})
     await this.db.collection('numeros').createIndex({codeCommune: 1})
     await this.db.collection('numeros').createIndex({idVoie: 1})
     await this.db.collection('numeros').createIndex({id: 1}, {unique: true})
-    await this.db.collection('numeros').createIndex({banId: 1}, {unique: true})
+    await this.db.collection('numeros').createIndex({banId: 1})
     await this.db.collection('numeros').createIndex({banIdMainCommonToponym: 1})
     await this.db.collection('numeros').createIndex({banIdSecondaryCommonToponyms: 1})
     await this.db.collection('numeros').createIndex({banIdDistrict: 1})
@@ -38,7 +38,7 @@ class Mongo {
     await this.db.collection('sources_communes').createIndex({source: 1, part: 1})
     await this.db.collection('communes').createIndex({compositionAskedAt: 1}, {sparse: true})
     await this.db.collection('communes').createIndex({codeCommune: 1}, {unique: true})
-    await this.db.collection('communes').createIndex({banId: 1}, {unique: true})
+    await this.db.collection('communes').createIndex({banId: 1})
     await this.db.collection('metrics').createIndex({name: 1, date: 1}, {unique: true})
   }