diff --git a/koha-tmpl/intranet-tmpl/prog/en/modules/catalogue/detail.tt b/koha-tmpl/intranet-tmpl/prog/en/modules/catalogue/detail.tt
index b6f03e1d95..229acb28ea 100644
--- a/koha-tmpl/intranet-tmpl/prog/en/modules/catalogue/detail.tt
+++ b/koha-tmpl/intranet-tmpl/prog/en/modules/catalogue/detail.tt
@@ -2039,7 +2039,7 @@
                             if (response.status === 409) {
                                 if (responseJSON.error_code === "already_bundled") {
                                     $("#addResult").replaceWith('<div id="addResult" class="alert alert-warning">' + _("Warning: Item '%s' already attached").format(barcode) + "</div>");
-                                } else if (responseJSON.error_code === "bundle_checkout_out") {
+                                } else if (responseJSON.error_code === "bundle_checked_out") {
                                     $("#addResult").replaceWith('<div id="addResult" class="alert alert-danger">' + _("Failure: Bundle is currently checked out") + "</div>");
                                 } else if (responseJSON.error_code === "checked_out") {
                                     const button = $('<button type="button">')
@@ -2151,7 +2151,7 @@
                             var barcode = $("#rm_external_id").val();
                             if (data.status === 409) {
                                 var response = data.responseJSON;
-                                if (response.error_code === "bundle_checkout_out") {
+                                if (response.error_code === "bundle_checked_out") {
                                     $("#removeResult").replaceWith('<div id="removeResult" class="alert alert-danger">' + _("Failure: Bundle is currently checked out") + "</div>");
                                 } else if (response.key === "PRIMARY") {
                                     $("#removeResult").replaceWith('<div id="removeResult" class="alert alert-warning">' + _("Warning: Item '%s' already attached").format(barcode) + "</div>");