Webform Module 2.0 and 2.0.1: Database error when using same field label two times

[kartobi]

When the same label exists twice in one webform with DataTarget=Database, MySql throws a duplicate key exception:

ERROR [sFormDataAccess: 661] Could not store field "Last Name" with value "xyz" into database for submitted form:
Last Name abc
Last Name xyz
com.mysql.jdbc.exceptions.MySQLIntegrityConstraintViolationException: Duplicate entry '828-Last Name' for key 'PRIMARY'
...

Sending per Email works fine.

Tested with Webform Module 2.0. and 2.0.1