lnrouter: fix primary key conflict in Policy update
lnrouter: fix primary key conflict in Policy update

vialectrum/vialectrum,wakiyamap/electrum-mona,pooler/electrum-ltc,wakiyamap/electrum-mona,vialectrum/vialectrum,wakiyamap/electrum-mona,vialectrum/vialectrum,spesmilo/electrum,spesmilo/electrum,pooler/electrum-ltc,spesmilo/electrum,spesmilo/electrum,pooler/electrum-ltc,wakiyamap/electrum-mona,pooler/electrum-ltc