Search and incremental replace

Dears,

Can you help me with the below concern, I need one liner for this.

Input_file.txt
dn: asdf=yyyyyyyyyyyyy426019001711473,ou=multiSCs,dc=btc
asdf: yyyyyyyyyyyyy426019001711473
DSUnitGroup: 1
objectClass: CUDBMultiServiceConsumer

dn: asdf=yyyyyyyyyyyyy426019001711351,ou=multiSCs,dc=btc
asdf: yyyyyyyyyyyyy426019001711351
DSUnitGroup: 3
objectClass: CUDBMultiServiceConsumer

dn: asdf=yyyyyyyyyyyyy426019001711436,ou=multiSCs,dc=btc
asdf: yyyyyyyyyyyyy426019001711436
DSUnitGroup: 8
objectClass: CUDBMultiServiceConsumer

dn: asdf=yyyyyyyyyyyyy426019001711326,ou=multiSCs,dc=btc
asdf: yyyyyyyyyyyyy426019001711326
DSUnitGroup: 16
objectClass: CUDBMultiServiceConsumer

dn: asdf=yyyyyyyyyyyyy426019001710223,ou=multiSCs,dc=btc
asdf: yyyyyyyyyyyyy426019001710223
DSUnitGroup: 6
objectClass: CUDBMultiServiceConsumer

The output should be like below, the should start from DSUnitGroup: 1 and incremented sequentially till it reach a particular count here let us say DSUnitGroup: 8, and once it is reached again it should start from DSUnitGroup: 1.

Output_file.txt
dn: asdf=yyyyyyyyyyyyy426019001711473,ou=multiSCs,dc=btc
asdf: yyyyyyyyyyyyy426019001711473
DSUnitGroup: 1
objectClass: CUDBMultiServiceConsumer

dn: asdf=yyyyyyyyyyyyy426019001711351,ou=multiSCs,dc=btc
asdf: yyyyyyyyyyyyy426019001711351
DSUnitGroup: 2
objectClass: CUDBMultiServiceConsumer

dn: asdf=yyyyyyyyyyyyy426019001711436,ou=multiSCs,dc=btc
asdf: yyyyyyyyyyyyy426019001711436
DSUnitGroup: 3
objectClass: CUDBMultiServiceConsumer

dn: asdf=yyyyyyyyyyyyy426019001711326,ou=multiSCs,dc=btc
asdf: yyyyyyyyyyyyy426019001711326
DSUnitGroup: 4
objectClass: CUDBMultiServiceConsumer

dn: asdf=yyyyyyyyyyyyy426019001710223,ou=multiSCs,dc=btc
asdf: yyyyyyyyyyyyy426019001710223
DSUnitGroup: 5
objectClass: CUDBMultiServiceConsumer

dn: asdf=yyyyyyyyyyyyy426019001710223,ou=multiSCs,dc=btc
asdf: yyyyyyyyyyyyy426019001710223
DSUnitGroup: 6
objectClass: CUDBMultiServiceConsumer

dn: asdf=yyyyyyyyyyyyy426019001710223,ou=multiSCs,dc=btc
asdf: yyyyyyyyyyyyy426019001710223
DSUnitGroup: 7
objectClass: CUDBMultiServiceConsumer

dn: asdf=yyyyyyyyyyyyy426019001710223,ou=multiSCs,dc=btc
asdf: yyyyyyyyyyyyy426019001710223
DSUnitGroup: 8
objectClass: CUDBMultiServiceConsumer

dn: asdf=yyyyyyyyyyyyy426019001710223,ou=multiSCs,dc=btc
asdf: yyyyyyyyyyyyy426019001710223
DSUnitGroup: 1
objectClass: CUDBMultiServiceConsumer

dn: asdf=yyyyyyyyyyyyy426019001710223,ou=multiSCs,dc=btc
asdf: yyyyyyyyyyyyy426019001710223
DSUnitGroup: 2
objectClass: CUDBMultiServiceConsumer

can you help me with the one liner string. to achieve this.

Repeat thread. See: https://www.unix.com/shell-programming-and-scripting/278089-find-replace-increament.html

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