Disable/Active bit from message

[aleite31]

Can I remove/disable a bit from original message ?

From message:

ISO 8583 v1987 ASCII Message:
MTI..........: 0400
Bitmap HEX...: F23A4001084182020000004000000000
Bitmap bits..:
[1-8]11110010 [9-16]00111010 [17-24]01000000 [25-32]00000001
[33-40]00001000 [41-48]01000001 [49-56]10000010 [57-64]00000010
[65-72]00000000 [73-80]00000000 [81-88]00000000 [89-96]01000000
[97-104]00000000 [105-112]00000000 [113-120]00000000 [121-128]00000000
F0 Message Type Indicator.....................: 0400
F2 Primary Account Number.....................: 1111****0000
F3 Processing Code............................: 180000
F4 Transaction Amount.........................: 30000
F7 Transmission Date & Time...................: 0109080646
F11 Systems Trace Audit Number (STAN)..........: 100331
F12 Local Transaction Time.....................: 001120
F13 Local Transaction Date.....................: 0909
F15 Settlement Date............................: 0809
F18 Merchant Type..............................: 9601
F32 Acquiring Institution Identification Code..:
F37 Retrieval Reference Number.................: 600020000000
F42 Card Acceptor Identification Code..........: 00003430003948
F48 Additional data (Private)..................: 08110012000004096565733200000003000001
F49 Transaction Currency Code..................: 360
F55 ICC Data – EMV Having Multiple Tags........: 0033 ... 0000
F63 Reserved (Private).........................: 132
F90 Original Data Elements.....................: 020000331609080645190000000020000000000000

I would like to disable bit2 of this message or other bit.
I imagine that removing the bit number from fieldsMap (message.go) maybe solve. It makes sense?