diff --git a/packages/strapi-plugin-content-type-builder/controllers/ContentTypeBuilder.js b/packages/strapi-plugin-content-type-builder/controllers/ContentTypeBuilder.js
index 3e9ead917d..a7911b4d1e 100755
--- a/packages/strapi-plugin-content-type-builder/controllers/ContentTypeBuilder.js
+++ b/packages/strapi-plugin-content-type-builder/controllers/ContentTypeBuilder.js
@@ -90,10 +90,9 @@ module.exports = {
     if (!name) return ctx.badRequest(null, [{ messages: [{ id: 'request.error.name.missing' }] }]);
     if (!_.includes(Service.getConnections(), connection)) return ctx.badRequest(null, [{ messages: [{ id: 'request.error.connection.unknow' }] }]);
     if (strapi.models[_.toLower(name)] && name !== model) return ctx.badRequest(null, [{ messages: [{ id: 'request.error.model.exist' }] }]);
-    if (!strapi.models[_.toLower(model)]) return ctx.badRequest(null, [{ messages: [{ id: 'request.error.model.unknow' }] }]);
+    if (!strapi.models[_.toLower(model)] && plugin && !strapi.plugins[_.toLower(plugin)].models[_.toLower(model)]) return ctx.badRequest(null, [{ messages: [{ id: 'request.error.model.unknow' }] }]);
     if (!_.isNaN(parseFloat(name[0]))) return ctx.badRequest(null, [{ messages: [{ id: 'request.error.model.name' }] }]);
     if (plugin && !strapi.plugins[_.toLower(plugin)]) return ctx.badRequest(null, [{ message: [{ id: 'request.error.plugin.name' }] }]);
-    if (plugin && !strapi.plugins[_.toLower(plugin)].models[_.toLower(model)]) return ctx.badRequest(null, [{ message: [{ id: 'request.error.model.unknow' }] }]);
 
     const [formatedAttributes, attributesErrors] = Service.formatAttributes(attributes, name.toLowerCase(), plugin);