diff --git a/compose/service/module.go b/compose/service/module.go
index c3960b6ef..8337d70b9 100644
--- a/compose/service/module.go
+++ b/compose/service/module.go
@@ -17,6 +17,7 @@ import (
 	"github.com/cortezaproject/corteza-server/pkg/handle"
 	"github.com/cortezaproject/corteza-server/pkg/label"
 	"github.com/cortezaproject/corteza-server/pkg/locale"
+	"github.com/cortezaproject/corteza-server/pkg/slice"
 	"github.com/cortezaproject/corteza-server/store"
 )
 
@@ -63,6 +64,19 @@ const (
 	moduleFieldsChanged moduleChanges = 4
 )
 
+var (
+	systemFields = slice.ToStringBoolMap([]string{
+		"recordID",
+		"ownedBy",
+		"createdBy",
+		"createdAt",
+		"updatedBy",
+		"updatedAt",
+		"deletedBy",
+		"deletedAt",
+	})
+)
+
 func Module() *module {
 	return &module{
 		ac:        DefaultAccessControl,
@@ -217,6 +231,16 @@ func (svc module) Create(ctx context.Context, new *types.Module) (*types.Module,
 			return ModuleErrInvalidHandle()
 		}
 
+		for _, f := range new.Fields {
+			if systemFields[f.Name] {
+				return ModuleErrFieldNameReserved()
+			}
+		}
+
+		if err != nil {
+
+		}
+
 		if ns, err = loadNamespace(ctx, s, new.NamespaceID); err != nil {
 			return err
 		}
@@ -574,6 +598,13 @@ func updateModuleFields(ctx context.Context, s store.Storer, new, old *types.Mod
 			f.NamespaceID = new.NamespaceID
 		}
 
+		if systemFields[f.Name] && !old.Fields.HasName(f.Name) {
+			// make sure we're backward compatible, or better:
+			// if, by some weird case, someone managed to get invalid field name into
+			// the store, we'll turn a blind eye.
+			return ModuleErrFieldNameReserved()
+		}
+
 		if f.ModuleID != new.ID {
 			return fmt.Errorf("module id of field %q does not match the module", f.Name)
 		}
diff --git a/compose/service/module_actions.gen.go b/compose/service/module_actions.gen.go
index f696e28a4..900c49e75 100644
--- a/compose/service/module_actions.gen.go
+++ b/compose/service/module_actions.gen.go
@@ -628,7 +628,7 @@ func ModuleErrNameNotUnique(mm ...*moduleActionProps) *errors.Error {
 		errors.Meta("resource", "compose:module"),
 
 		// action log entry; no formatting, it will be applied inside recordAction fn.
-		errors.Meta(moduleLogMetaKey{}, "used duplicate username ({{module.name}}) for module"),
+		errors.Meta(moduleLogMetaKey{}, "used duplicate name ({{module.name}}) for module"),
 		errors.Meta(modulePropsMetaKey{}, p),
 
 		// translation namespace & key
@@ -644,6 +644,40 @@ func ModuleErrNameNotUnique(mm ...*moduleActionProps) *errors.Error {
 	return e
 }
 
+// ModuleErrFieldNameReserved returns "compose:module.fieldNameReserved" as *errors.Error
+//
+//
+// This function is auto-generated.
+//
+func ModuleErrFieldNameReserved(mm ...*moduleActionProps) *errors.Error {
+	var p = &moduleActionProps{}
+	if len(mm) > 0 {
+		p = mm[0]
+	}
+
+	var e = errors.New(
+		errors.KindInternal,
+
+		p.Format("field name is reserved for system fields", nil),
+
+		errors.Meta("type", "fieldNameReserved"),
+		errors.Meta("resource", "compose:module"),
+
+		errors.Meta(modulePropsMetaKey{}, p),
+
+		// translation namespace & key
+		errors.Meta(locale.ErrorMetaNamespace{}, "compose"),
+		errors.Meta(locale.ErrorMetaKey{}, "module.errors.fieldNameReserved"),
+
+		errors.StackSkip(1),
+	)
+
+	if len(mm) > 0 {
+	}
+
+	return e
+}
+
 // ModuleErrStaleData returns "compose:module.staleData" as *errors.Error
 //
 //
diff --git a/compose/service/module_actions.yaml b/compose/service/module_actions.yaml
index 1dfbcb0c8..09492a6ff 100644
--- a/compose/service/module_actions.yaml
+++ b/compose/service/module_actions.yaml
@@ -71,9 +71,12 @@ errors:
 
   - error: nameNotUnique
     message: "name not unique"
-    log: "used duplicate username ({{module.name}}) for module"
+    log: "used duplicate name ({{module.name}}) for module"
     severity: warning
 
+  - error: fieldNameReserved
+    message: "field name is reserved for system fields"
+
   - error: staleData
     message: "stale data"
     severity: warning
diff --git a/tests/compose/module_test.go b/tests/compose/module_test.go
index f2500b27d..a68d9a350 100644
--- a/tests/compose/module_test.go
+++ b/tests/compose/module_test.go
@@ -266,6 +266,57 @@ func TestModuleFieldsUpdate(t *testing.T) {
 	h.a.Equal(m.Fields[1].Kind, "DateTime")
 }
 
+func TestModuleUpdateWithReservedFieldName(t *testing.T) {
+	h := newHelper(t)
+	h.clearModules()
+
+	helpers.AllowMe(h, types.NamespaceRbacResource(0), "read", "modules.search")
+	ns := h.makeNamespace("some-namespace")
+	m := h.makeModule(ns, "some-module", &types.ModuleField{ID: id.Next(), Kind: "String", Name: "ownedBy"})
+	helpers.AllowMe(h, types.ModuleRbacResource(0, 0), "update")
+
+	f := m.Fields[0]
+	fjs := fmt.Sprintf(`{ "name": "%s", "fields": [{ "fieldID": "%d", "name": "ownedBy", "kind": "Number" }]}`, m.Name, f.ID)
+	h.apiInit().
+		Post(fmt.Sprintf("/namespace/%d/module/%d", ns.ID, m.ID)).
+		Header("Accept", "application/json").
+		JSON(fjs).
+		Expect(t).
+		Status(http.StatusOK).
+		Assert(helpers.AssertNoErrors).
+		End()
+
+	f = m.Fields[0]
+	fjs = fmt.Sprintf(`{ "name": "%s", "fields": [{ "fieldID": "%d", "name": "updatedBy", "kind": "Number" }]}`, m.Name, f.ID)
+	h.apiInit().
+		Post(fmt.Sprintf("/namespace/%d/module/%d", ns.ID, m.ID)).
+		Header("Accept", "application/json").
+		JSON(fjs).
+		Expect(t).
+		Status(http.StatusOK).
+		Assert(helpers.AssertError("module.errors.fieldNameReserved")).
+		End()
+}
+
+func TestModuleCreateWithReservedFieldName(t *testing.T) {
+	h := newHelper(t)
+	h.clearModules()
+
+	helpers.AllowMe(h, types.NamespaceRbacResource(0), "read", "modules.search")
+	ns := h.makeNamespace("some-namespace")
+	helpers.AllowMe(h, types.ModuleRbacResource(0, 0), "update")
+
+	fjs := fmt.Sprintf(`{ "name": "foo", "fields": [{ "name": "ownedBy", "kind": "Number" }]}`)
+	h.apiInit().
+		Post(fmt.Sprintf("/namespace/%d/module/", ns.ID)).
+		Header("Accept", "application/json").
+		JSON(fjs).
+		Expect(t).
+		Status(http.StatusOK).
+		Assert(helpers.AssertError("module.errors.fieldNameReserved")).
+		End()
+}
+
 func TestModuleFieldsUpdate_defaults(t *testing.T) {
 	h := newHelper(t)
 	h.clearModules()