I continue with this code and still trying to understand why my hash works but still get piles of warning saying

Use of uninitialized value at ./perl.m line 24, <FH> chunk 894.
Use of uninitialized value at ./perl.m line 24, <FH> chunk 894.
Use of uninitialized value at ./perl.m line 24, <FH> chunk 896.
Use of uninitialized value at ./perl.m line 24, <FH> chunk 898.
Use of uninitialized value at ./perl.m line 24, <FH> chunk 900.
Use of uninitialized value at ./perl.m line 24, <FH> chunk 902.
Use of uninitialized value at ./perl.m line 24, <FH> chunk 904.
Use of uninitialized value at ./perl.m line 24, <FH> chunk 906.
Use of uninitialized value at ./perl.m line 24, <FH> chunk 922.
Use of uninitialized value at ./perl.m line 24, <FH> chunk 924.
Use of uninitialized value at ./perl.m line 24, <FH> chunk 926.
Use of uninitialized value at ./perl.m line 24, <FH> chunk 928.
Use of uninitialized value at ./perl.m line 24, <FH> chunk 930.
Use of uninitialized value at ./perl.m line 24, <FH> chunk 932.
Use of uninitialized value at ./perl.m line 24, <FH> chunk 934.
Use of uninitialized value at ./perl.m line 24, <FH> chunk 936.
Use of uninitialized value at ./perl.m line 24, <FH> chunk 938.
Use of uninitialized value at ./perl.m line 24, <FH> chunk 940.
Use of uninitialized value at ./perl.m line 24, <FH> chunk 942.
Use of uninitialized value at ./perl.m line 24, <FH> chunk 944.
Use of uninitialized value at ./perl.m line 24, <FH> chunk 946.
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Also, I try to debug this program, and I see that push happens twice(?) in one record. Why? There shoud be only one $callid and $sipm per record.

main::(perl.m:6):     my $cbn = $";
  DB<2>    
main::(perl.m:8):     $/ = "\n\n";
  DB<2> 
main::(perl.m:9):     $" = "\n";
  DB<2> 
main::(perl.m:11):    open FH, 'file1' or die "can't open file $!";
  DB<2> 
main::(perl.m:13):    my $callid;
  DB<2> 
main::(perl.m:14):    my $sipm;
  DB<2> 
main::(perl.m:15):    my %data1 = ();
  DB<2> 
main::(perl.m:17):    while (<FH>) {
  DB<2> 
main::(perl.m:18):            chomp;
  DB<2> 
main::(perl.m:19):            if (m/###|^$/) {
  DB<2> 
main::(perl.m:20):                    next;
  DB<2> 
main::(perl.m:18):            chomp;
  DB<2> 
main::(perl.m:19):            if (m/###|^$/) {
  DB<2> 
main::(perl.m:22):            m{(?:^SIP\/2\.0 )?(\d\d\d|^[A-Z]{3,6} ).
+*(Call-ID: [\S]{25,80})[^ ]+: .*}s;
  DB<2> 
main::(perl.m:23):            ($sipm,$callid) = ($1,$2);
  DB<2> 
main::(perl.m:24):            push (@{$data1{$callid}}, $sipm);
  DB<2> 
main::(perl.m:24):            push (@{$data1{$callid}}, $sipm);
  DB<2> 
main::(perl.m:17):    while (<FH>) {
  DB<2> 
main::(perl.m:18):            chomp;
  DB<2> 
main::(perl.m:19):            if (m/###|^$/) {
  DB<2> 
main::(perl.m:20):                    next;
  DB<2> 
main::(perl.m:18):            chomp;
  DB<2> 
main::(perl.m:19):            if (m/###|^$/) {
  DB<2> 
main::(perl.m:22):            m{(?:^SIP\/2\.0 )?(\d\d\d|^[A-Z]{3,6} ).
+*(Call-ID: [\S]{25,80})[^ ]+: .*}s;
  DB<2> 
main::(perl.m:23):            ($sipm,$callid) = ($1,$2);
  DB<2> 
main::(perl.m:24):            push (@{$data1{$callid}}, $sipm);
  DB<2> 
main::(perl.m:24):            push (@{$data1{$callid}}, $sipm);
  DB<2> 
main::(perl.m:17):    while (<FH>) {
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