If you need to change one or more parameters in fhicl files for multiple sbndaq configurations, you may follow the procedure as described below.

Check out the latest sbndaq project code into your MRB area, run a build, followed by the mrb -i; mrbslp command that installs configuration migration tools into the $SBNDAQ_DIR/configDB_tools directory.
Review examples of configuration migration scripts in $MRB_TOP/srcs/sbndaq/configDB_tools/config-migration-scripts/ and create a new one if required. Rerun the mrb -i; mrbslp command to install your new script into the $MRB_TOP/localProducts_*/sbndaq/version/configDB_tools/config-migration-scripts directory.
Setup the sbndaq product from the $MRB_TOP/localProducts_* directory and confirm that the migrateConfigs.sh script will execute from $MRB_TOP/localProducts_* by running the which migrateConfigs.sh command.

ups list -aK+ sbndaq -z $MRB_TOP/localProducts_*
#$ "sbndaq" "v1_00_00" "Linux64bit+3.10-2.17" "e20:prof:s112" ""
setup "sbndaq" "v1_00_00" -q "e20:prof:s112"
which migrateConfigs.sh
#$ ~/DAQ_DevAreas/DAQ_12Oct2021/localProducts_sbndaq_v1_00_00_e20_prof_s112/sbndaq/v1_00_00/configDB_tools/migrateConfigs.sh

Create a new file with a list of configuration names you need to migrate.
Run migrateConfigs.sh --help and review its usage.

migrateConfigs.sh --help
Info: Running migrateConfigs.sh
Info: Instructions https://sbnsoftware.github.io/sbn_online_wiki/MigrateConfigs

Usage:
  migrateConfigs.sh -c configs.list -s migrate.script [-d tmpdir]
Options:
  -c, --configs  file containing a list of configurations to migrate,
                   default=/home/nfs/icarus/DAQ_DevAreas/DAQ_12Oct2021/localProducts_sbndaq_v1_00_00_e20_prof_s112/sbndaq/v1_00_00/configDB_tools/config-migration-scripts/configs-example.list
  -s, --script   migration script,
                   default=/home/nfs/icarus/DAQ_DevAreas/DAQ_12Oct2021/localProducts_sbndaq_v1_00_00_e20_prof_s112/sbndaq/v1_00_00/configDB_tools/config-migration-scripts/migrate-example.script
  -d, --tmpdir   temporary working directory name,
                   default=migrateconfigs_13Oct2021
Examples:
  migrateConfigs.sh \
    -c /home/nfs/icarus/DAQ_DevAreas/DAQ_12Oct2021/localProducts_sbndaq_v1_00_00_e20_prof_s112/sbndaq/v1_00_00/configDB_tools/config-migration-scripts/configs-example.list \
    -s /home/nfs/icarus/DAQ_DevAreas/DAQ_12Oct2021/localProducts_sbndaq_v1_00_00_e20_prof_s112/sbndaq/v1_00_00/configDB_tools/config-migration-scripts/migrate-example.script

  migrateConfigs.sh \
    -c /home/nfs/icarus/DAQ_DevAreas/DAQ_12Oct2021/localProducts_sbndaq_v1_00_00_e20_prof_s112/sbndaq/v1_00_00/configDB_tools/config-migration-scripts/configs-example.list \
    -s /home/nfs/icarus/DAQ_DevAreas/DAQ_12Oct2021/localProducts_sbndaq_v1_00_00_e20_prof_s112/sbndaq/v1_00_00/configDB_tools/config-migration-scripts/migrate-example.script  \
    -d migrateconfigs_13Oct2021

Migrate sbndaq configurations.

migrateConfigs.sh -c ./my-configs.list -s ./my-working-migrate.script

Check the output for errors.

Info: Running migrateConfigs.sh
Info: Instructions https://sbnsoftware.github.io/sbn_online_wiki/MigrateConfigs
Info: Running migrateConfigs.sh with options:
	configs=/home/nfs/icarus/DAQ_DevAreas/DAQ_12Oct2021/localProducts_sbndaq_v1_00_00_e20_prof_s112/sbndaq/v1_00_00/configDB_tools/config-migration-scripts/configs-example.list
	script=/home/nfs/icarus/DAQ_DevAreas/DAQ_12Oct2021/localProducts_sbndaq_v1_00_00_e20_prof_s112/sbndaq/v1_00_00/configDB_tools/config-migration-scripts/migrate-example.script
	tmpdir=migrateconfigs_13Oct2021

Info: The default schema.fcl is located in /home/nfs/icarus/DAQ_DevAreas/DAQ_12Oct2021/localProducts_sbndaq_v1_00_00_e20_prof_s112/sbndaq/v1_00_00/configDB_tools/config.
Info: Working directory is /home/nfs/icarus/CONFIG_MigrationArea/migrateconfigs_13Oct2021.
Info: Migrating myTest-00001.
Last configuration myTest-00001
Exported ('SystemLayout', 'schema', 'schema.fcl')
Exported ('Hashes', 'hashes', 'hashes.fcl')
Exported ('PMTs', 'icaruspmteebot01', 'myTest-/icaruspmteebot01.fcl')
.....
Exported ('CRTs', 'icaruscrt_feb97', 'myTest-/icaruscrt_feb97.fcl')
True
**************************************************************************************
Info: Running /home/nfs/icarus/DAQ_DevAreas/DAQ_12Oct2021/localProducts_sbndaq_v1_00_00_e20_prof_s112/sbndaq/v1_00_00/configDB_tools/config-migration-scripts/migrate-example.script.
Info: Current working directory is /home/nfs/icarus/CONFIG_MigrationArea/migrateconfigs_13Oct2021/configs/exportmyTest-00001/myTest-.
Info: This script (migrate-example.script) runs in the ./exportmyTest-00001/myTest- directory where connftool.py exported fhicl files.
      The counter variable should be incremented for each error and returned to the caller of this script.
      If this script exits with a zero return code, then the caller will import fhicl files in ./exportmyTest-00001/myTest- as a new configuration.

Info: Migrating DataLogger_standard.fcl.
Info: Migrating Dispatcher_standard.fcl.
Info: Migrating EventBuilder_standard.fcl.
Info: Migrating icarustpc_standard.fcl.
Info: Migrating pmt_standard.fcl.
**************************************************************************************
New configuration myTest-00017
Imported ('SystemLayout', 'schema', './schema.fcl')
Imported ('Hashes', 'hashes', './hashes.fcl')
Imported ('PMTs', 'icaruspmteebot01', './myTest-/icaruspmteebot01.fcl')
.....
Imported ('CRTs', 'icaruscrt_feb97', './myTest-/icaruscrt_feb97.fcl')
New configuration myTest-00017
None
Info: Migrated myTest-00001.