when I used gatk MergeVcfs module to merge multiple vcf files, several errors were gave as following:

gatk MergeVcfs -I SCA_957_N.germline_raw.vcf -I SCA_917_N.germline_raw.vcf -O merge.vcf

Using GATK jar /pub/anaconda3/share/gatk4-4.2.0.0-1/gatk-package-4.2.0.0-local.jar
Running:
java -Dsamjdk.use_async_io_read_samtools=false -Dsamjdk.use_async_io_write_samtools=true -Dsamjdk.use_async_io_write_tribble=false -Dsamjdk.compression_level=2 -jar /pub/anaconda3/share/gatk4-4.2.0.0-1/gatk-package-4.2.0.0-local.jar MergeVcfs -I SCA_957_N.germline_raw.vcf -I SCA_917_N.germline_raw.vcf -O merge.vcf
09:56:29.779 INFO NativeLibraryLoader - Loading libgkl_compression.so from jar:file:/pub/anaconda3/share/gatk4-4.2.0.0-1/gatk-package-4.2.0.0-local.jar!/com/intel/gkl/native/libgkl_compression.so
[Thu Nov 11 09:56:29 CST 2021] MergeVcfs --INPUT SCA_957_N.germline_raw.vcf --INPUT SCA_917_N.germline_raw.vcf --OUTPUT merge.vcf --VERBOSITY INFO --QUIET false --VALIDATION_STRINGENCY STRICT --COMPRESSION_LEVEL 2 --MAX_RECORDS_IN_RAM 500000 --CREATE_INDEX true --CREATE_MD5_FILE false --GA4GH_CLIENT_SECRETS client_secrets.json --help false --version false --showHidden false --USE_JDK_DEFLATER false --USE_JDK_INFLATER false
Nov 11, 2021 9:56:29 AM shaded.cloud_nio.com.google.auth.oauth2.ComputeEngineCredentials runningOnComputeEngine
INFO: Failed to detect whether we are running on Google Compute Engine.
[Thu Nov 11 09:56:29 CST 2021] Executing as ug0416@gs72 on Linux 4.15.0-153-generic amd64; OpenJDK 64-Bit Server VM 1.8.0_282-b08; Deflater: Intel; Inflater: Intel; Provider GCS is available; Picard version: Version:4.2.0.0
[Thu Nov 11 09:56:30 CST 2021] picard.vcf.MergeVcfs done. Elapsed time: 0.01 minutes.
Runtime.totalMemory()=2155872256
To get help, see http://broadinstitute.github.io/picard/index.html#GettingHelp
java.lang.IllegalArgumentException: Input file /home/ug0416/mydata/05.gatk/g.germline/SCA_917_N.germline_raw.vcf has sample entries that don't match the other files.
at picard.vcf.MergeVcfs.doWork(MergeVcfs.java:203)
at picard.cmdline.CommandLineProgram.instanceMain(CommandLineProgram.java:308)
at org.broadinstitute.hellbender.cmdline.PicardCommandLineProgramExecutor.instanceMain(PicardCommandLineProgramExecutor.java:37)
at org.broadinstitute.hellbender.Main.runCommandLineProgram(Main.java:160)
at org.broadinstitute.hellbender.Main.mainEntry(Main.java:203)
at org.broadinstitute.hellbender.Main.main(Main.java:289)

my vcf files were successfully generated by gatk HaplotypeCaller aiming analyze germline mutation:

cat config | while read id
do
echo "start HaplotypeCaller for ${id}" `date`
gatk --java-options "-Xmx4g -Djava.io.temdir=./tmp" HaplotypeCaller -ERC GVCF \
-R ~/mydata/genome/hg38/Homo_sapiens_assembly38.fasta \
-I ~/mydata/05.gatk/a.BQSR/geneplus/${id}.sort.mardup.BQSR.bam \
--dbsnp ~/mydata/genome/dbsnp_146.hg38.vcf.gz \
-L ~/mydata/genome/hg38_bed/xGen_Exome_Research_Panel.target-hg38.bed \
-O ${id}.germline_raw.vcf \
1>${id}.germline-step1.log 2>&1
echo "finish HaplotypeCaller for ${id}" `date`
done

I don't know what's the matter, I need your help! Hope your reponse! Appreciate