diff -r 0d0646e7c401 -r 8f0ffe559ea0 pidgin/pidginmessage.c
--- a/pidgin/pidginmessage.c	Fri Jul 19 03:04:16 2019 -0500
+++ b/pidgin/pidginmessage.c	Fri Jul 19 11:15:07 2019 -0500
@@ -117,6 +117,14 @@
 		case PROP_MESSAGE:
 			pidgin_message_set_message(msg, g_value_get_object(value));
 			break;
+		case PROP_ID:
+		case PROP_CONTENT_TYPE:
+		case PROP_TIMESTAMP:
+		case PROP_AUTHOR:
+		case PROP_CONTENTS:
+		case PROP_EDITED:
+			/* we don't allow settings these */
+			break;
 		default:
 			G_OBJECT_WARN_INVALID_PROPERTY_ID(obj, param_id, pspec);
 			break;