cubicweb #2146391 Mysql : Identifier name 'unique_cw_cwsourcehostconfig_cw_cw_host_config_of_cw_match_host_idx' is too long [deprecated]

On db-create (or db-init) with mysql

Traceback (most recent call last):
File "/usr/bin/cubicweb-ctl", line 4, in <module>
  run(sys.argv[1:])
File "/home/arthur/src/public/cubicweb/cubicweb/cwctl.py", line 1001, in run
  CWCTL.run(args)
File "/home/arthur/src/public/cubicweb/logilab/common/clcommands.py", line 134, in run
  sys.exit(command.main_run(args, rcfile))
File "/home/arthur/src/public/cubicweb/logilab/common/clcommands.py", line 263, in main_run
  self.run(args)
File "/home/arthur/src/public/cubicweb/cubicweb/server/serverctl.py", line 395, in run
  str(self.config.config_level), config.appid])
File "/home/arthur/src/public/cubicweb/logilab/common/clcommands.py", line 134, in run
  sys.exit(command.main_run(args, rcfile))
File "/home/arthur/src/public/cubicweb/logilab/common/clcommands.py", line 263, in main_run
  self.run(args)
File "/home/arthur/src/public/cubicweb/cubicweb/server/serverctl.py", line 454, in run
  init_repository(config, drop=self.config.drop)
File "/home/arthur/src/public/cubicweb/cubicweb/server/__init__.py", line 173, in init_repository
  sqlexec(schemasql, execute, pbtitle=_title, delimiter=';;')
File "/home/arthur/src/public/cubicweb/cubicweb/server/sqlutils.py", line 70, in sqlexec
  execute(str(sql))
File "/usr/lib/pymodules/python2.7/MySQLdb/cursors.py", line 166, in execute
  self.errorhandler(self, exc, value)
File "/usr/lib/pymodules/python2.7/MySQLdb/connections.py", line 35, in defaulterrorhandler
  raise errorclass, errorvalue
_mysql_exceptions.OperationalError: (1059, "Identifier name 'unique_cw_cwsourcehostconfig_cw_cw_host_config_of_cw_match_host_idx' is too long")
prioritynormal
typebug
done in<not specified>
load0.000
load left0.000
closed by<not specified>