It looks like you are using NVMe SSD drive. can you check the compatibility and update to latest driver. Check vmkernel and hostd log when creating datastore
You can check this as well
what size is your nvme ? 1.2TB ?
seems like installer has always created a 1.09tb datastore1 with vmfs6, so you have no space left to create another datastore
Thank you for you answer. I tried last desperate thing which I totaly forgot about which was installation of ESXi v6.7u3 and it resolved the problem. Now on both NVMe SSDs I'm able to create VMFS partitions without any problems.