Fix UUID

[rekby]

test for reproduce:
https://gist.github.com/rekby/d2f5f9ba267ae97b65ecc862eb9b08a3

[rekby]

php can't write uuid and read wrong uuid - as raw bytes:
6E73B41C-4EDE-4D08-9CFB-B7462D9E498B readed as 4d084ede6e73b41c.