strange error message from phpMyAdmin

[simon13]

Hi everyone! I had one small question.
this is my query:

SELECT CONCAT(t_client.prenom_client,' ',t_client.nom_client)AS client,
t_client.client_id AS numero,
t_client.parrain_id AS numero_parrain,
t_client.nom_parrain,
COUNT(t_client.parrain_id) as Filleuls
FROM t_client,t_commission
WHERE t_client.parrain_id = t_commission.parrain
GROUP BY client
ORDER BY t_client.parrain_id LIMIT 0, 30

this is what I get from phpMyAdmin:

MySQL said: Table 'bd_facturation.#sql96_b5_0' doesn't exist

What the hell is this about a table called sql96_b5_0? No table is named like that. My query worked previously. Does anyone know anything that could help?
Thanks in advance!
Simon

[echo]

Not sure if this is of any help but..
Group by and Order by don't seem to work well together.