diff --git a/otterdog/eclipse-tractusx.jsonnet b/otterdog/eclipse-tractusx.jsonnet
index 7223bbc..d7e40b5 100644
--- a/otterdog/eclipse-tractusx.jsonnet
+++ b/otterdog/eclipse-tractusx.jsonnet
@@ -346,7 +346,6 @@ orgs.newOrg('eclipse-tractusx') {
     orgs.newRepo('portal-backend') {
       allow_update_branch: false,
       description: "Portal Backend",
-      default_branch: "main",
       delete_branch_on_merge: true,
       secret_scanning_push_protection: "disabled",
       web_commit_signoff_required: false,
@@ -372,7 +371,6 @@ orgs.newOrg('eclipse-tractusx') {
     },
     orgs.newRepo('portal-cd') {
       allow_update_branch: false,
-      default_branch: "main",
       delete_branch_on_merge: true,
       description: "Portal - Continuous Deployment",
       secret_scanning_push_protection: "disabled",
@@ -395,7 +393,6 @@ orgs.newOrg('eclipse-tractusx') {
     orgs.newRepo('portal-frontend') {
       allow_update_branch: false,
       description: "Portal Frontend",
-      default_branch: "main",
       delete_branch_on_merge: true,
       secret_scanning_push_protection: "disabled",
       web_commit_signoff_required: false,
@@ -417,7 +414,6 @@ orgs.newOrg('eclipse-tractusx') {
     orgs.newRepo('portal-frontend-registration') {
       allow_update_branch: false,
       description: "Portal Frontend Registration",
-      default_branch: "main",
       delete_branch_on_merge: true,
       secret_scanning_push_protection: "disabled",
       web_commit_signoff_required: false,