port outdated complains after self-update to version 2.10 of MacPorts

[Kenneth Wolcott]

port outdated
sqlite error: attempt to write a readonly database (8) while executing
query: CREATE INDEX registry.snapshot_file_id ON snapshot_files(id)
    while executing
"registry::open $db_path"
    (procedure "mportinit" line 832)
    invoked from within
"mportinit ui_options global_options global_variations"
Error: /opt/local/bin/port: Failed to initialize MacPorts, sqlite
error: attempt to write a readonly database (8) while executing query:
CREATE INDEX registry.snapshot_file_id ON snapshot_files(id)