Aborting import of duplicates is broken

[westram]

Reproduce:

• import attached rna.fasta twice
  • once using run --import rna.fasta (+ generate new IDs + format ali)
  • once more using File/Import/...from external format
• during the 2nd import, the nameserver will generate the same names as during 1st import
  ⇒ arb warns about ID conflicts
  • answering don't import does not skip the import of these duplicates, but instead creates duplicate database entries with identical names

Problems:

• resulting database contains multiple species with identical IDs (name)
• if has chosen to import species w/o generating new names (i.e. answered Use found names) an attempt to synchronize IDs leads to the following weird error message:

  Expected that a species named 'MtMMazei' exists (maybe there are duplicate species, database might be corrupt)
  

  • if new names were generated during import (as described above), synchronize IDs should be able to resolve the problem (by generating IDs with suffixes ".2" etc)

Note: restarting arb with the (defect) database detects the problem with duplicate IDs and tells how it may be fixed:

Database is corrupted:
Found 4 duplicated species with identical names!
Fix the problem using
   'Search For Equal Fields and Mark Duplicates'
in ARB_NTREE search tool, save DB and restart ARB.

[westram]

resulting database (with duplicate IDs)

[westram]

resulting if imported with "use found names"