diff --git a/models/booking/booking.go b/models/booking/booking.go
index 711e5ba..80c3068 100644
--- a/models/booking/booking.go
+++ b/models/booking/booking.go
@@ -10,7 +10,6 @@ import (
 	"cloud.o-forge.io/core/oc-lib/tools"
 )
 
-
 /*
 * Booking is a struct that represents a booking
  */
diff --git a/models/utils/common.go b/models/utils/common.go
index 0c749d7..8feefca 100755
--- a/models/utils/common.go
+++ b/models/utils/common.go
@@ -128,10 +128,8 @@ func ModelGenericUpdateOne(change map[string]interface{}, id string, a Accessor)
 		r.Sign()
 	}
 
-	loaded := r.Serialize(r)   // get the loaded object
-	for k, v := range change { // apply the changes, with a flatten method
-		loaded[k] = v
-	}
+	loaded := r.Serialize(r) // get the loaded object
+	deepMerge(loaded, change)
 	newObj := a.NewObj()
 	b, err = json.Marshal(loaded)
 	if err != nil {
@@ -255,6 +253,87 @@ func IsMySelf(peerID string, wfa Accessor) (bool, string) {
 	return peerID == pp.GetID(), pp.GetID()
 }
 
+// deepMerge overlays patch values onto base, preserving base values for keys
+// absent from patch, nil patch values, and empty strings when base is non-empty.
+// This prevents partial frontend payloads from silently erasing server-managed
+// fields (source, env, country, owners, creator_id, creation_date, …).
+func deepMerge(base, patch map[string]interface{}) {
+	for k, pv := range patch {
+		bv := base[k]
+		switch pvTyped := pv.(type) {
+		case map[string]interface{}:
+			if bvMap, ok := bv.(map[string]interface{}); ok {
+				deepMerge(bvMap, pvTyped)
+			} else {
+				base[k] = pv
+			}
+		case []interface{}:
+			if bvSlice, ok := bv.([]interface{}); ok {
+				base[k] = mergeSlices(bvSlice, pvTyped)
+			} else {
+				base[k] = pv
+			}
+		case string:
+			// Don't overwrite a non-empty base value with an empty string.
+			if pvTyped != "" {
+				base[k] = pv
+			}
+		default:
+			if pv != nil {
+				base[k] = pv
+			}
+		}
+	}
+}
+
+// mergeSlices merges two slices element-wise.
+// For slices of maps it matches elements by their "id" field when available;
+// falls back to positional matching. An empty patch slice leaves base intact.
+func mergeSlices(base, patch []interface{}) []interface{} {
+	if len(patch) == 0 {
+		return base
+	}
+	for _, e := range patch {
+		if _, ok := e.(map[string]interface{}); !ok {
+			return patch // non-map elements: replace wholesale
+		}
+	}
+	baseByID := map[string]map[string]interface{}{}
+	for _, e := range base {
+		if em, ok := e.(map[string]interface{}); ok {
+			if id, ok := em["id"].(string); ok && id != "" {
+				baseByID[id] = em
+			}
+		}
+	}
+	result := make([]interface{}, 0, len(patch))
+	for i, pe := range patch {
+		pm, _ := pe.(map[string]interface{})
+		if pm == nil {
+			result = append(result, pe)
+			continue
+		}
+		var baseElem map[string]interface{}
+		if id, ok := pm["id"].(string); ok && id != "" {
+			baseElem = baseByID[id]
+		}
+		if baseElem == nil && i < len(base) {
+			baseElem, _ = base[i].(map[string]interface{})
+		}
+		if baseElem != nil {
+			merged := make(map[string]interface{}, len(baseElem))
+			for k, v := range baseElem {
+				merged[k] = v
+			}
+			deepMerge(merged, pm)
+			result = append(result, merged)
+		} else {
+			result = append(result, pe)
+		}
+	}
+	return result
+}
+
 func GenerateNodeID() (string, error) {
 	folderStatic := "/var/lib/opencloud-node"
 	if _, err := os.Stat(folderStatic); err == nil {