NWDI Transport issue

Hi There,

We have implemented the CTS+ functionality in our NWDI portal landscape  and tested the same. It is working fine.

Initially transports are created with SIDXXXXX ( *K900009) after this point, all the transports are creating with alphabets ( SIDK90000A, SIDK90000B, SIDK90000C etc.)

Could you please let me know why it is creating instead of numbers.

Is it standard behavior if not please let me know how to correct this.

Thanks,

Pavan.