diff --git a/services/tenantProfile.go b/services/tenantProfile.go
index bcf4128..ec5c786 100644
--- a/services/tenantProfile.go
+++ b/services/tenantProfile.go
@@ -26,6 +26,12 @@ var editableTenantFields = map[string]bool{
 	"tenantname":  true,
 	"tenantimage": true,
 	"tenantinfo":  true,
+	// The kind of shop it is. Omitting it was a silent data loss: store setup
+	// marks Store type REQUIRED, sends it on save, and the merchant is shown a
+	// successful step while the answer is dropped here. It describes the
+	// business rather than its standing on the platform, so it belongs to the
+	// merchant in the way "approved" and "partnerid" do not.
+	"tenanttype": true,
 
 	// How to reach the business.
 	"primaryemail":   true,
diff --git a/services/tenantProfile_test.go b/services/tenantProfile_test.go
index 65787d3..31074a8 100644
--- a/services/tenantProfile_test.go
+++ b/services/tenantProfile_test.go
@@ -98,3 +98,35 @@ func TestFieldNamesAreMatchedLeniently(t *testing.T) {
 		t.Errorf("want the field normalised onto its column, got %+v", clean)
 	}
 }
+
+// Store setup marks Store type REQUIRED and sends it on save. It was missing
+// from the allowlist, so the merchant answered a required question, saw the
+// step succeed, and the answer was dropped on the floor — measured on local
+// tenant 9002, which reached the end of setup with `tenanttype` still empty.
+func TestTheKindOfShopIsTheMerchantsToSet(t *testing.T) {
+	clean, err := TenantProfileUpdate(map[string]any{"tenanttype": "grocery"})
+	if err != nil {
+		t.Fatalf("TenantProfileUpdate: %v", err)
+	}
+	if clean["tenanttype"] != "grocery" {
+		t.Errorf("tenanttype did not survive the allowlist: %#v", clean)
+	}
+}
+
+// Letting the shop describe itself must not have opened a door next to it.
+func TestAllowingTheShopTypeDidNotAllowItsStanding(t *testing.T) {
+	clean, err := TenantProfileUpdate(map[string]any{
+		"tenanttype":  "pharmacy",
+		"tenanttoken": "stolen",
+		"partnerid":   99,
+		"configid":    7,
+	})
+	if err != nil {
+		t.Fatalf("TenantProfileUpdate: %v", err)
+	}
+	for _, forbidden := range []string{"tenanttoken", "partnerid", "configid"} {
+		if _, present := clean[forbidden]; present {
+			t.Errorf("%q survived the allowlist", forbidden)
+		}
+	}
+}