Warning:  [mysql error 2006] MySQL server has gone away

SELECT tag_id, COUNT(DISTINCT(it.image_id)) AS counter
  FROM piwigo_image_category ic
    INNER JOIN piwigo_image_tag it
    ON ic.image_id=it.image_id
  WHERE 1=1
   AND  (category_id NOT IN (102,105,106,109,110,111,135,138,152,153,154,155,156,157,158,159,171,191,192,259,261,262,348,392,449,462,485,486,492,493,511,512,519,520,540,541,556,585,604,605,684,700,701,702,703,704,732,741,742,749,750,751,752,753,755,756,758,759,760,761,762,763,764,765,766,772,775,776,797,811,815,817,818,820,828,832,833,834,862,879,881,882,885,924,927,940,941,942,1029,1033,1048,1053,1067,1068,1072,1075,1079,1080,1084,1085,1086,1087,1088,1089,1090,1091,1094,1096,1097,1101,1124,1158,1163,1174,1182,1185,1186,1188,1190,1191,1192,1196,1197,1198,1201,1202,1203,1204,1205,1206,1207,1208,1209,1210,1211,1213,1214,1216,1218,1219,1220,1221,1222,1223,1224,1225,1226,1227,1228,1230,1233,1236,1237,1239,1240,1241,1242,1244,1245,1246,1247,1248,1249,1250,1251,1252,1253,1254,1255,1256,1258,1259,1260,1261,1 in /home/mrjean/www/piwigo/include/dblayer/functions_mysqli.inc.php on line 847

Warning:  [mysql error 2006] MySQL server has gone away

REPLACE INTO piwigo_sessions
  (id,data,expiration)
  VALUES('039185567a4462e3ffaec88e840cdc755fc3','',now())
; in /home/mrjean/www/piwigo/include/dblayer/functions_mysqli.inc.php on line 847