Web Admin page blowing up while accessing virtual hosts list

Hi!, running 2.1.12 I see this error access http://server:5280/admin/vhosts/

=CRASH REPORT==== 17-Oct-2013::06:38:09 ===
crasher:
initial call: ejabberd_http:init/2
pid: <0.459.0>
registered_name: []
exception exit: {aborted,
{no_exists,
[reg_users_counter,
[{{reg_users_counter,"",'$1'},
[],
['$1']}]]}}
in function mnesia:abort/1 (mnesia.erl, line 309)
in call from ejabberd_auth_internal:get_vh_registered_users_number/1 (ejabberd_auth_internal.erl, line 251)
in call from lists:map/2 (lists.erl, line 1224)
in call from ejabberd_auth:get_vh_registered_users_number/1 (ejabberd_auth.erl, line 214)
in call from ejabberd_web_admin:'-list_vhosts2/2-fun-0-'/1 (ejabberd_web_admin.erl, line 1470)
in call from lists:map/2 (lists.erl, line 1224)
in call from ejabberd_web_admin:list_vhosts2/2 (ejabberd_web_admin.erl, line 1465)
in call from ejabberd_web_admin:process_admin/2 (ejabberd_web_admin.erl, line 1034)
ancestors: [ejabberd_http_sup,ejabberd_sup,<0.37.0>]
messages: []
links: [<0.204.0>,#Port<0.3625>]
dictionary: [{random_seed,{24610,8075,18459}}]
trap_exit: false
status: running
heap_size: 4185
stack_size: 27
reductions: 2369
neighbours:

I'm using mysql based external authentication