[BUG] Upgrade game version issue

[YuanYuanOwO]

Description

After upgrading 1.20.4 to 1.20.6, the shulker box shop has lost the number of items, e.g. before upgrading the shulker box shop has 1728 items, after upgrading the shulker box shop will have 27 items.

Steps to reproduce

1. create a shop with shulker box(1728 items in shulker box) in 1.20.4
2. upgrade server version(1.20.4 to 1.20.6)
3. after upgrade,the shulker box shop only have 27 items in the shulker box

Expected Behaviour

should be still 1728 items in shulker box

Screenshots

N/A

/quickshop paste URL

https://ghost-chu.github.io/quickshop-hikari-paste-viewer/?remote=https%3A%2F%2Fbytebin.lucko.me%2FFQNU6hLlT3

Additional Context

No response

Checklist

• I'm running Paper or Spigot, and not a fork
• I confirm that Paper/Spigot has been updated to the latest build
• I confirm that QuickShop-Hikari has been updated to the latest stable version released on Modrinth (or the latest CI version)
• I confirm that I have not read these checkboxes and therefore I just ticked them all.
• I confirm that I'm using QuickShop-Hikari, not QuickShop-Reremake, and I'm well aware that they're maintained by different people, and that Reremake issues shouldn't be reported here.
• I confirm that I am running a server that is not a Hybird Server, (e.g. Mohist, Magma, CatServer, Banner, etc.), and I am aware that QuickShop-Hikari may not function properly on a Forge/Fabric hybrid server, and I am running at my own risk on such a server program, and I am aware that the I run such server-side programs at my own risk and know that I will not receive any support or help for this behavior.
• I am well aware that if the Issue Ticket is not filled out correctly and completely, it will simply be closed without any response or reason.