diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8ff0dc77a..eb91632ae 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -17,6 +17,7 @@
 - Fix a bug: unable to cancel the upgrade before it begins
 - Fix a bug: in the admin calendar, the trainings' info panel shows "duration: null minutes"
 - Fix a bug: on the subscriptions page, not logged-in users do not see the action button
+- Fix a bug: unable to map a new setup to the db network
 - `SUPERADMIN_EMAIL` renamed to `ADMINSYS_EMAIL`
 - `scripts/run-tests.sh` renamed to `scripts/tests.sh`
 - [BREAKING CHANGE] GET `open_api/v1/invoices` won't return `stp_invoice_id` OR `stp_payment_intent_id` anymore. The new field `payment_gateway_object` will contain some similar data if the invoice was paid online by card.
diff --git a/setup/setup.sh b/setup/setup.sh
index 791427faf..360c1f1fa 100755
--- a/setup/setup.sh
+++ b/setup/setup.sh
@@ -213,7 +213,7 @@ prepare_nginx()
     if [ "$confirm" != "n" ]; then
       echo "Adding a network configuration to the docker-compose.yml file..."
       yq -i eval '.networks.web.external = "true"' docker-compose.yml
-      yq -i eval -n '.networks.db = "" | .networks.db="!!null"' docker-compose.yml
+      yq -i eval '.networks.db = null' docker-compose.yml
       yq -i eval '.services.fabmanager.networks += ["web"]' docker-compose.yml
       yq -i eval '.services.fabmanager.networks += ["db"]' docker-compose.yml
       yq -i eval '.services.postgres.networks += ["db"]' docker-compose.yml