} else if (strcasecmp(last_key, "mark") == 0) {
char *buf = NULL;
sasprintf(&buf, "%.*s", (int)len, val);
+
+ /* We unmark any containers using this mark to avoid duplicates. */
+ con_unmark(buf);
+
json_node->mark = buf;
} else if (strcasecmp(last_key, "floating") == 0) {
char *buf = NULL;