Paula,
If the new SCORM package is just an update of the existing package, and it was modified using the same SCORM authoring tool, the ID will most likely be the same by default. However, if you created a totally new SCORM package or used a different authoring tool, then you will need to open the .zip file and edit some of the files;
See the following forum posts:
https://moodle.org/mod/forum/discuss.php?d=228272
https://moodle.org/mod/forum/discuss.php?d=334760
https://moodle.org/mod/forum/discuss.php?d=276324