Unable to add partition

Unable to add partition

I successfully installed MacOS Big Sur Beta 11.0 on ThinkPad T460S which runs smoothly and flawlessly.Currently i am having a problem with disk partition using Disk Utility. From the image below, this the storage space of my SSD without any partition,


But when i click on + to add partition, this happens, there is an automatic partition that has 18.4 Gb of storage. I cant seem to delete it and when i click + again to add more partition, the partition is automatically added with that 18.4 Gb partition and cant go beyond that.



How can i solve this issue? Do i have to clean install the MacOS again?

submitted by /u/Blaise1995
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