if !ref.OwnPrimaryKey {
					foreignFields = append(foreignFields, ref.ForeignKey)
				}
			}
			if _, fvs := schema.GetIdentityFieldValuesMap(association.DB.Statement.Context, reflectValue, foreignFields); len(fvs) > 0 {
				column, values := schema.ToQueryValues(rel.FieldSchema.Table, rel.FieldSchema.PrimaryFieldDBNames, fvs)
				oldBelongsToExpr = clause.IN{Column: column, Values: values}
			}
		}

		// save associations