Help with puzzle needed

[Joseph]

So i'm fan on CTC channel on YT and I decided to try myself in a puzzle. I tried today's puzzle with ID: 000H4T

I came up with this solution, i cannot submit it but I also cannot see anything wrong here... Please help me out

I also have issues with adding my attachment so I'll type solution
3/4/6/5/2/1
1/2/5/46/46/3
5/1/3/46/46/2
2/6/4/1/3/5
6/5/2/3/1/4
4/3/1/2/5/6

46 means that I can put either 4 or 6 

Please help me out it's my first solved puzzle...