Price precision with bonds in a buy transaction

Hello,

Example :

Currency : NZD

Shares : 10.000 (ten thousands)

Bond price : 101,316% (decimal point is comma)

In investment detail the price precision is set to 6.

When I introduce the buy security transaction the price precision is restricted to 4.

(see screenshots)

How can I introduce a bond with 6 decimals ?

Thank you for any help,