Data loss during upgradation from 1.8.1 to 2.0.0

2.0.0 Manifest <manifest><remote name="couchbase" fetch=" git://github.com/couchbase/ "/><remote name="membase" fetch=" git://github.com/membase/ "/><remote name="apache" fetch=" git://github.com/apache/ "/><remote name="erlang" fetch=" git://github.com/erlang/ "/><default remote="couchbase" revision="master"/><project name="tlm" path="tlm" revision="ab70f6d42f46621ec576889e57cb37ac2d64a84b"><copyfile src="Makefile.top" dest="Makefile"/></project><project name="bucket_engine" path="bucket_engine" revision="70b3624abc697b7d18bf3d57f331b7674544e1e7"/><project name="ep-engine" path="ep-engine" revision="de36522e8faf7d2d63ef208cf3b51e1081a66a9a"/><project name="libconflate" path="libconflate" revision="3cf7107eaa5b52b34cc9f887cf0e2edb3465988e"/><project name="libmemcached" path="libmemcached" revision="ca739a890349ac36dc79447e37da7caa9ae819f5" remote="membase"/><project name="libvbucket" path="libvbucket" revision="00d3763593c116e8e5d97aa0b646c42885727398"/><project name="membase-cli" path="membase-cli" revision="4ee17fd815f97d579a7eadb9becd269e7133a30b" remote="membase"/><project name="memcached" path="memcached" revision="858731183b08cd6b72fa6e68c1fb4208cb87570d" remote="membase"/><project name="moxi" path="moxi" revision="52a5fa887bfff0bf719c4ee5f29634dd8707500e"/><project name="ns_server" path="ns_server" revision="12b04acddd4e14a26fa6d39727b65dee10e904d4"/><project name="portsigar" path="portsigar" revision="1bc865e1622fb93a3fe0d1a4cdf18eb97ed9d600"/><project name="sigar" path="sigar" revision="63a3cd1b316d2d4aa6dd31ce8fc66101b983e0b0"/><project name="couchbase-examples" path="couchbase-examples" revision="21e6161a1d064979b5c6aa99cd34ccc41c9d7aca"/><project name="couchbase-python-client" path="couchbase-python-client" revision="86b398e4fbc1f2e38d356e14df0c1bb4e3d2427b"/><project name="couchdb" path="couchdb" revision="bf5c23b6af2f31656dcd96f9892fc9c2c66b5b48"/><project name="couchdbx-app" path="couchdbx-app" revision="d196377b5b1ba3ce25f1b92066e2741898b01a1e"/><project name="couchstore" path="couchstore" revision="29579bd47f7c916c43116722b8f4962b4ea9fff0"/><project name="geocouch" path="geocouch" revision="7782df1a53104e9c8bb9ef941a9b499bbc7cd61e"/><project name="mccouch" path="mccouch" revision="88701cc326bc3dde4ed072bb8441be83adcfb2a5"/><project name="testrunner" path="testrunner" revision="1aee704a53ad889d9bb5b0c8e2f2d2a385f55f9e"/><project name="otp" path="otp" revision="b6dc1a844eab061d0a7153d46e7e68296f15a504" remote="erlang"/><project name="icu4c" path="icu4c" revision="26359393672c378f41f2103a8699c4357c894be7" remote="couchbase"/><project name="snappy" path="snappy" revision="5681dde156e9d07adbeeab79666c9a9d7a10ec95" remote="couchbase"/><project name="v8" path="v8" revision="447decb75060a106131ab4de934bcc374648e7f2" remote="couchbase"/><project name="gperftools" path="gperftools" revision="8f60ba949fb8576c530ef4be148bff97106ddc59" remote="couchbase"/><project name="pysqlite" path="pysqlite" revision="0ff6e32ea05037fddef1eb41a648f2a2141009ea" remote="couchbase"/></manifest> 1.8.1.x manifest <manifest><remote name="apache" fetch=" git://github.com/apache/ "/><remote name="couchbase" fetch=" git://10.1.1.210/ "/><remote name="erlang" fetch=" git://github.com/erlang/ "/><remote name="membase" fetch=" git://10.1.1.210/ "/><default remote="membase" revision="master"/><project name="bucket_engine" path="bucket_engine" revision="6a1236580aabcb1c02b9432c7dfc63a85b57f06d"/><project name="couchbase-python-client" path="couchbase-python-client" revision="3bd552c47ba0273d79159a5c808d6de2cd955dcb" remote="couchbase"/><project name="ep-engine" path="ep-engine" revision="e718aa3ee4326a71fab6f72367134f968ea5e9b7"/><project name="icu4c" path="icu4c" revision="26359393672c378f41f2103a8699c4357c894be7" remote="couchbase"/><project name="libconflate" path="libconflate" revision="fee8f9463b61931f303a1ee2727016b73a5fa37e"/><project name="libmemcached" path="libmemcached" revision="ca739a890349ac36dc79447e37da7caa9ae819f5"/><project name="libvbucket" path="libvbucket" revision="752482a49fa8c4914b594e82908919da63d0df68"/><project name="membase-cli" path="membase-cli" revision="9b898b44012466f109caa830409e0db34dd47350"/><project name="membasex" path="membasex" revision="0ea8bce6b838ea6d781f58d60778a8215597bfcf" remote="couchbase"/><project name="memcached" path="memcached" revision="cff6723da67a4c8572e0bfabf011efbb212afc82"/><project name="memcachetest" path="memcachetest" revision="88ae3b3fc92ebfb0ece0427d95c374525133ca1f"/><project name="moxi" path="moxi" revision="52a5fa887bfff0bf719c4ee5f29634dd8707500e"/><project name="ns_server" path="ns_server" revision="8faeffa190a333fa5d250a90b4a8690606615999"/><project name="otp" path="otp" revision="4a5a75811e2cd590b5c94f71864a5245fd511ccf" remote="erlang"/><project name="portsigar" path="portsigar" revision="a191e6c348ec73487dceaecc1c5a76c85b750bdb" remote="couchbase"/><project name="sigar" path="sigar" revision="e1dcf3235129510d91d1d5303d1d93f133e3fb90" remote="couchbase"/><project name="spidermonkey" path="spidermonkey" revision="a3c48c1736642ea41ee935391d57137d17d297ec" remote="couchbase"/><project name="tlm" path="tlm" revision="fb7b81d1c4814dd9ba33fccbcc8f62d7f81dd02c"><copyfile src="Makefile.top" dest="Makefile"/></project><project name="vbucketmigrator" path="vbucketmigrator" revision="0fdc96cafc7227d52cbf4682ba7462923b773dae"/><project name="workload-generator" path="workload-generator" revision="0d57d80c3cef28142dd3a423303b1e8cef56421b" remote="couchbase"/><project name="testrunner" path="testrunner" revision="1d33c693860caab23315156da8668d82415cb8e1" remote="couchbase"/><project name="gperftools" path="gperftools" revision="8f60ba949fb8576c530ef4be148bff97106ddc59" remote="couchbase"/></manifest>