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<b>Warning</b>:  session_start(): open(/var/lib/php/sessions/sess_cipnfkof30djl9i8ir8ujceclo, O_RDWR) failed: No space left on device (28) in <b>/var/www/tb-usercake/models/config.php</b> on line <b>51</b><br />
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<b>Warning</b>:  session_start(): Failed to read session data: files (path: /var/lib/php/sessions) in <b>/var/www/tb-usercake/models/config.php</b> on line <b>51</b><br />
svoid cMigrateField(Concept c, S oldField, S newField) {
  if (c == null) ret;
  S oldValue = cget(c, oldField);
  S newValue = cget(c, newField);
  if (oldValue != null && newValue == null) pcall {
    S name = shortDynName(c);
    print("Migrating " + name + "." + oldField + " -> " + name + "." + newField + " [id " + c.id + "]");
    cset(c, newField, oldValue);
    cset(c, oldField, null);
  }
}